{
  "generated_at": "2026-04-28",
  "sources": [
    {
      "name": "Wikipedia: Marathon world record progression",
      "url": "https://en.wikipedia.org/wiki/Marathon_world_record_progression",
      "usage": "Historical progression tables for men and women."
    },
    {
      "name": "World Athletics: Sawe 1:59:30 / Assefa 2:15:41 London report",
      "url": "https://worldathletics.org/news/report/sawe-two-hour-assefa-world-record-london-marathon",
      "usage": "Latest 2026 marks and pending-ratification note."
    },
    {
      "name": "World Athletics: Chepngetich 2:09:56 ratification",
      "url": "https://worldathletics.org/news/press-releases/ratified-world-records-chebet-duplantis-mclaughlin-levrone-chepngetich-kawano",
      "usage": "Women mixed marathon record ratification."
    },
    {
      "name": "World Athletics: Kiptum 2:00:35 ratification",
      "url": "https://worldathletics.org/news/press-releases/ratified-world-marathon-record-kelvin-kiptum",
      "usage": "Men marathon record ratification before 2026 pending mark."
    }
  ],
  "records": [
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:55:18.4",
      "athlete": "Johnny Hayes",
      "nationality": "United States",
      "date": "July 24, 1908",
      "event": "London Olympics, England",
      "source": "IAAF",
      "notes": "Time was officially recorded as 2:55:18 2/5. Italian Dorando Pietri finished in 2:54:46.4, but was disqualified for receiving assistance from race officials near the finish.",
      "seconds": 10518.4,
      "decimal_year": 1908.560109,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:52:45.4",
      "athlete": "Robert Fowler",
      "nationality": "United States",
      "date": "January 1, 1909",
      "event": "Yonkers, United States",
      "source": "IAAF",
      "notes": "",
      "seconds": 10365.4,
      "decimal_year": 1909.0,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:46:52.8",
      "athlete": "James Clark",
      "nationality": "United States",
      "date": "February 12, 1909",
      "event": "New York City, United States",
      "source": "IAAF",
      "notes": "",
      "seconds": 10012.8,
      "decimal_year": 1909.115068,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:46:04.6",
      "athlete": "Albert Raines",
      "nationality": "United States",
      "date": "May 8, 1909",
      "event": "New York City, United States",
      "source": "IAAF",
      "notes": "",
      "seconds": 9964.6,
      "decimal_year": 1909.347945,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:42:31.0",
      "athlete": "Henry Barrett",
      "nationality": "United Kingdom",
      "date": "May 8, 1909",
      "event": "Polytechnic Marathon, London, England",
      "source": "IAAF",
      "notes": "",
      "seconds": 9751.0,
      "decimal_year": 1909.347945,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:40:34.2",
      "athlete": "Thure Johansson",
      "nationality": "Sweden",
      "date": "August 31, 1909",
      "event": "Stockholm, Sweden",
      "source": "IAAF",
      "notes": "",
      "seconds": 9634.2,
      "decimal_year": 1909.663014,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:38:16.2",
      "athlete": "Harry Green",
      "nationality": "United Kingdom",
      "date": "May 12, 1913",
      "event": "Polytechnic Marathon",
      "source": "IAAF",
      "notes": "",
      "seconds": 9496.2,
      "decimal_year": 1913.358904,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:36:06.6",
      "athlete": "Alexis Ahlgren",
      "nationality": "Sweden",
      "date": "May 31, 1913",
      "event": "Polytechnic Marathon",
      "source": "IAAF",
      "notes": "Report in The Times claiming world record.",
      "seconds": 9366.6,
      "decimal_year": 1913.410959,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:38:00.8",
      "athlete": "Umberto Blasi",
      "nationality": "Italy",
      "date": "November 29, 1914",
      "event": "Legnano, Italy",
      "source": "ARRS",
      "notes": "",
      "seconds": 9480.8,
      "decimal_year": 1914.909589,
      "status": "ARRS progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:32:35.8",
      "athlete": "Hannes Kolehmainen",
      "nationality": "Finland",
      "date": "August 22, 1920",
      "event": "Antwerp Olympics, Belgium",
      "source": "IAAF, ARRS",
      "notes": "The course distance was officially reported to be 42,750 meters/26.56 miles, however, the Association of Road Racing Statisticians estimated the course to be 40 km.",
      "seconds": 9155.8,
      "decimal_year": 1920.639344,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:29:01.8",
      "athlete": "Albert Michelsen",
      "nationality": "United States",
      "date": "October 12, 1925",
      "event": "Port Chester Marathon, United States",
      "source": "IAAF",
      "notes": "",
      "seconds": 8941.8,
      "decimal_year": 1925.778082,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:30:57.6",
      "athlete": "Harry Payne",
      "nationality": "United Kingdom",
      "date": "July 5, 1929",
      "event": "AAA Championships, London, England",
      "source": "ARRS",
      "notes": "",
      "seconds": 9057.6,
      "decimal_year": 1929.506849,
      "status": "ARRS progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:26:14",
      "athlete": "Sohn Kee-chung",
      "nationality": "Japanese Korea",
      "date": "March 21, 1935",
      "event": "Tokyo, Japan",
      "source": "ARRS",
      "notes": "Also romanized as Kitei Son.",
      "seconds": 8774.0,
      "decimal_year": 1935.216438,
      "status": "ARRS progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:27:49.0",
      "athlete": "Fusashige Suzuki",
      "nationality": "Japan",
      "date": "March 31, 1935",
      "event": "Tokyo, Japan",
      "source": "IAAF",
      "notes": "According to the Association of Road Racing Statisticians, Suzuki's 2:27:49 performance occurred in Tokyo on March 21, 1935, during a race in which he finished second to Sohn Kee-chung (sometimes referred to as Kee-Jung Sohn or Son Kitei) who ran a 2:26:14.",
      "seconds": 8869.0,
      "decimal_year": 1935.243836,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:26:44.0",
      "athlete": "Yasuo Ikenaka",
      "nationality": "Japan",
      "date": "April 3, 1935",
      "event": "Tokyo, Japan",
      "source": "IAAF",
      "notes": "",
      "seconds": 8804.0,
      "decimal_year": 1935.252055,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:26:42",
      "athlete": "Sohn Kee-chung",
      "nationality": "Japanese Korea",
      "date": "November 3, 1935",
      "event": "Meiji Shrine Games, Tokyo, Japan",
      "source": "IAAF",
      "notes": "Also romanized as Kitei Son.",
      "seconds": 8802.0,
      "decimal_year": 1935.838356,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:25:39",
      "athlete": "Suh Yun-bok",
      "nationality": "Korea",
      "date": "April 19, 1947",
      "event": "Boston Marathon",
      "source": "IAAF",
      "notes": "Disputed (short course). Disputed (point-to-point).",
      "seconds": 8739.0,
      "decimal_year": 1947.29589,
      "status": "Listed / disputed"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:20:42.2",
      "athlete": "Jim Peters",
      "nationality": "United Kingdom",
      "date": "June 14, 1952",
      "event": "Polytechnic Marathon",
      "source": "IAAF, ARRS",
      "notes": "MarathonGuide.com states the course was slightly long. Report in The Times claiming world record.",
      "seconds": 8442.2,
      "decimal_year": 1952.45082,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:18:40.4",
      "athlete": "Jim Peters",
      "nationality": "United Kingdom",
      "date": "June 13, 1953",
      "event": "Polytechnic Marathon",
      "source": "IAAF, ARRS",
      "notes": "Report in The Times claiming world record.",
      "seconds": 8320.4,
      "decimal_year": 1953.446575,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:18:34.8",
      "athlete": "Jim Peters",
      "nationality": "United Kingdom",
      "date": "October 4, 1953",
      "event": "Turku Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 8314.8,
      "decimal_year": 1953.756164,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:17:39.4",
      "athlete": "Jim Peters",
      "nationality": "United Kingdom",
      "date": "June 26, 1954",
      "event": "Polytechnic Marathon",
      "source": "IAAF",
      "notes": "Point-to-point course. Report in The Times claiming world record.",
      "seconds": 8259.4,
      "decimal_year": 1954.482192,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:18:04.8",
      "athlete": "Paavo Kotila",
      "nationality": "Finland",
      "date": "August 12, 1956",
      "event": "Finnish Athletics Championships, Pieksämäki, Finland",
      "source": "ARRS",
      "notes": "",
      "seconds": 8284.8,
      "decimal_year": 1956.612022,
      "status": "ARRS progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:15:17.0",
      "athlete": "Sergei Popov",
      "nationality": "Soviet Union",
      "date": "August 24, 1958",
      "event": "European Athletics Championships, Stockholm, Sweden",
      "source": "IAAF, ARRS",
      "notes": "The ARRS notes Popov's extended time as 2:15:17.6",
      "seconds": 8117.0,
      "decimal_year": 1958.643836,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:15:16.2",
      "athlete": "Abebe Bikila",
      "nationality": "Ethiopia",
      "date": "September 10, 1960",
      "event": "Rome Olympics, Italy",
      "source": "IAAF, ARRS",
      "notes": "World record fastest marathon run in bare feet.",
      "seconds": 8116.2,
      "decimal_year": 1960.691257,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:15:15.8",
      "athlete": "Toru Terasawa",
      "nationality": "Japan",
      "date": "February 17, 1963",
      "event": "Beppu-Ōita Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 8115.8,
      "decimal_year": 1963.128767,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:14:28",
      "athlete": "Leonard Edelen",
      "nationality": "United States",
      "date": "June 15, 1963",
      "event": "Polytechnic Marathon",
      "source": "IAAF",
      "notes": "Point-to-point course. Report in The Times claiming world record and stating that the course may have been long.",
      "seconds": 8068.0,
      "decimal_year": 1963.452055,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:14:43",
      "athlete": "Brian Kilby",
      "nationality": "United Kingdom",
      "date": "July 6, 1963",
      "event": "Port Talbot, Wales",
      "source": "ARRS",
      "notes": "",
      "seconds": 8083.0,
      "decimal_year": 1963.509589,
      "status": "ARRS progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:13:55",
      "athlete": "Basil Heatley",
      "nationality": "United Kingdom",
      "date": "June 13, 1964",
      "event": "Polytechnic Marathon",
      "source": "IAAF",
      "notes": "Point-to-point course. Report in The Times claiming world record.",
      "seconds": 8035.0,
      "decimal_year": 1964.448087,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:12:11.2",
      "athlete": "Abebe Bikila",
      "nationality": "Ethiopia",
      "date": "October 21, 1964",
      "event": "Tokyo Olympics, Japan",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 7931.2,
      "decimal_year": 1964.803279,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:12:00",
      "athlete": "Morio Shigematsu",
      "nationality": "Japan",
      "date": "June 12, 1965",
      "event": "Polytechnic Marathon",
      "source": "IAAF",
      "notes": "Point-to-point course. Report in The Times claiming world record.",
      "seconds": 7920.0,
      "decimal_year": 1965.443836,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:09:36.4",
      "athlete": "Derek Clayton",
      "nationality": "Australia",
      "date": "December 3, 1967",
      "event": "Fukuoka Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 7776.4,
      "decimal_year": 1967.920548,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:08:33.6",
      "athlete": "Derek Clayton",
      "nationality": "Australia",
      "date": "May 30, 1969",
      "event": "Antwerp, Belgium",
      "source": "IAAF",
      "notes": "Disputed (short course).",
      "seconds": 7713.6,
      "decimal_year": 1969.408219,
      "status": "Listed / disputed"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:09:28.8",
      "athlete": "Ron Hill",
      "nationality": "United Kingdom",
      "date": "July 23, 1970",
      "event": "Edinburgh Commonwealth Games, Scotland",
      "source": "ARRS",
      "notes": "",
      "seconds": 7768.8,
      "decimal_year": 1970.556164,
      "status": "ARRS progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:09:12",
      "athlete": "Ian Thompson",
      "nationality": "United Kingdom",
      "date": "January 31, 1974",
      "event": "Christchurch Commonwealth Games, New Zealand",
      "source": "ARRS",
      "notes": "",
      "seconds": 7752.0,
      "decimal_year": 1974.082192,
      "status": "ARRS progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:09:05.6",
      "athlete": "Shigeru So",
      "nationality": "Japan",
      "date": "February 5, 1978",
      "event": "Beppu-Ōita Marathon",
      "source": "ARRS",
      "notes": "",
      "seconds": 7745.6,
      "decimal_year": 1978.09589,
      "status": "ARRS progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:09:01",
      "athlete": "Gerard Nijboer",
      "nationality": "Netherlands",
      "date": "April 26, 1980",
      "event": "Amsterdam Marathon",
      "source": "ARRS",
      "notes": "",
      "seconds": 7741.0,
      "decimal_year": 1980.31694,
      "status": "ARRS progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:08:18",
      "athlete": "Robert De Castella",
      "nationality": "Australia",
      "date": "December 6, 1981",
      "event": "Fukuoka Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 7698.0,
      "decimal_year": 1981.928767,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:08:05",
      "athlete": "Steve Jones",
      "nationality": "United Kingdom",
      "date": "October 21, 1984",
      "event": "Chicago Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 7685.0,
      "decimal_year": 1984.803279,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:07:12",
      "athlete": "Carlos Lopes",
      "nationality": "Portugal",
      "date": "April 20, 1985",
      "event": "Rotterdam Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 7632.0,
      "decimal_year": 1985.29863,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:06:50",
      "athlete": "Belayneh Dinsamo",
      "nationality": "Ethiopia",
      "date": "April 17, 1988",
      "event": "Rotterdam Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 7610.0,
      "decimal_year": 1988.29235,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:06:05",
      "athlete": "Ronaldo da Costa",
      "nationality": "Brazil",
      "date": "September 20, 1998",
      "event": "Berlin Marathon",
      "source": "IAAF, ARRS",
      "notes": "First time the 40K mark was passed under two hours (1:59:55).",
      "seconds": 7565.0,
      "decimal_year": 1998.717808,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:05:42",
      "athlete": "Khalid Khannouchi",
      "nationality": "Morocco",
      "date": "October 24, 1999",
      "event": "Chicago Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 7542.0,
      "decimal_year": 1999.810959,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:05:38",
      "athlete": "Khalid Khannouchi",
      "nationality": "United States",
      "date": "April 14, 2002",
      "event": "London Marathon",
      "source": "IAAF, ARRS",
      "notes": "First \"World's Best\" recognized by the International Association of Athletics Federations. The ARRS notes Khannouchi's extended time as 2:05:37.8",
      "seconds": 7538.0,
      "decimal_year": 2002.282192,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:04:55",
      "athlete": "Paul Tergat",
      "nationality": "Kenya",
      "date": "September 28, 2003",
      "event": "Berlin Marathon",
      "source": "IAAF, ARRS",
      "notes": "First world record for the men's marathon ratified by the International Association of Athletics Federations.",
      "seconds": 7495.0,
      "decimal_year": 2003.739726,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:04:26",
      "athlete": "Haile Gebrselassie",
      "nationality": "Ethiopia",
      "date": "September 30, 2007",
      "event": "Berlin Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 7466.0,
      "decimal_year": 2007.745205,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:03:59",
      "athlete": "Haile Gebrselassie",
      "nationality": "Ethiopia",
      "date": "September 28, 2008",
      "event": "Berlin Marathon",
      "source": "IAAF, ARRS",
      "notes": "The ARRS notes Gebrselassie's extended time as 2:03:58.2. Video on YouTube",
      "seconds": 7439.0,
      "decimal_year": 2008.740437,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:03:38",
      "athlete": "Patrick Makau",
      "nationality": "Kenya",
      "date": "September 25, 2011",
      "event": "Berlin Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 7418.0,
      "decimal_year": 2011.731507,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:03:23",
      "athlete": "Wilson Kipsang",
      "nationality": "Kenya",
      "date": "September 29, 2013",
      "event": "Berlin Marathon",
      "source": "IAAF ARRS",
      "notes": "The ARRS notes Kipsang's extended time as 2:03:22.2",
      "seconds": 7403.0,
      "decimal_year": 2013.742466,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:02:57",
      "athlete": "Dennis Kimetto",
      "nationality": "Kenya",
      "date": "September 28, 2014",
      "event": "Berlin Marathon",
      "source": "IAAF ARRS",
      "notes": "The ARRS notes Kimetto's extended time as 2:02:56.4",
      "seconds": 7377.0,
      "decimal_year": 2014.739726,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:01:39",
      "athlete": "Eliud Kipchoge",
      "nationality": "Kenya",
      "date": "September 16, 2018",
      "event": "Berlin Marathon",
      "source": "IAAF",
      "notes": "",
      "seconds": 7299.0,
      "decimal_year": 2018.706849,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:01:09",
      "athlete": "Eliud Kipchoge",
      "nationality": "Kenya",
      "date": "September 25, 2022",
      "event": "Berlin Marathon",
      "source": "World Athletics",
      "notes": "",
      "seconds": 7269.0,
      "decimal_year": 2022.731507,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "2:00:35",
      "athlete": "Kelvin Kiptum",
      "nationality": "Kenya",
      "date": "October 8, 2023",
      "event": "Chicago Marathon",
      "source": "World Athletics",
      "notes": "",
      "seconds": 7235.0,
      "decimal_year": 2023.767123,
      "status": "World Athletics progression"
    },
    {
      "category": "Men",
      "race_type": "Men",
      "time": "1:59:30",
      "athlete": "Sabastian Sawe",
      "nationality": "Kenya",
      "date": "April 26, 2026",
      "event": "London Marathon",
      "source": "World Athletics",
      "notes": "Pending ratification. First man to break 2:00:00 in a record-eligible marathon",
      "seconds": 7170.0,
      "decimal_year": 2026.315068,
      "status": "Pending ratification"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "5:40",
      "athlete": "Marie-Louise Ledru",
      "nationality": "France",
      "date": "September 29, 1918",
      "event": "Tour de Paris Marathon",
      "source": "ARRS",
      "notes": "",
      "seconds": 340.0,
      "decimal_year": 1918.742466,
      "status": "ARRS progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "3:40:22",
      "athlete": "Violet Piercy",
      "nationality": "United Kingdom",
      "date": "October 3, 1926",
      "event": "London",
      "source": "IAAF",
      "notes": "The ARRS indicates that Piercy's 3:40:22 was set on August 2, 1926, during a time trial on a course that was only 35.4 km.",
      "seconds": 13222.0,
      "decimal_year": 1926.753425,
      "status": "Listed / disputed"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "3:37:07",
      "athlete": "Merry Lepper",
      "nationality": "United States",
      "date": "December 16, 1963",
      "event": "Culver City, United States",
      "source": "IAAF",
      "notes": "Disputed (short course).",
      "seconds": 13027.0,
      "decimal_year": 1963.956164,
      "status": "Listed / disputed"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "3:27:45",
      "athlete": "Dale Greig",
      "nationality": "United Kingdom",
      "date": "May 23, 1964",
      "event": "Ryde",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 12465.0,
      "decimal_year": 1964.39071,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "3:19:33",
      "athlete": "Mildred Sampson",
      "nationality": "New Zealand",
      "date": "July 21, 1964",
      "event": "Auckland, New Zealand",
      "source": "IAAF",
      "notes": "Disputed by ARRS as a time trial.",
      "seconds": 11973.0,
      "decimal_year": 1964.551913,
      "status": "Listed / disputed"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "3:14:23",
      "athlete": "Maureen Wilton",
      "nationality": "Canada",
      "date": "May 6, 1967",
      "event": "Toronto, Canada",
      "source": "IAAF, ARRS",
      "notes": "The ARRS notes Wilton's extended time as 3:14:22.8",
      "seconds": 11663.0,
      "decimal_year": 1967.342466,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "3:07:27.2",
      "athlete": "Anni Pede-Erdkamp",
      "nationality": "West Germany",
      "date": "September 16, 1967",
      "event": "Waldniel, West Germany",
      "source": "IAAF, ARRS",
      "notes": "The ARRS notes Pede-Erdkamp's extended time as 3:07:26.2",
      "seconds": 11247.2,
      "decimal_year": 1967.706849,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "3:02:53",
      "athlete": "Caroline Walker",
      "nationality": "United States",
      "date": "February 28, 1970",
      "event": "Seaside, OR",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 10973.0,
      "decimal_year": 1970.158904,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "3:01:42",
      "athlete": "Elizabeth Bonner",
      "nationality": "United States",
      "date": "May 9, 1971",
      "event": "Philadelphia, United States",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 10902.0,
      "decimal_year": 1971.350685,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:55:22",
      "athlete": "Elizabeth Bonner",
      "nationality": "United States",
      "date": "September 19, 1971",
      "event": "New York City Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 10522.0,
      "decimal_year": 1971.715068,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:49:40",
      "athlete": "Cheryl Bridges",
      "nationality": "United States",
      "date": "December 5, 1971",
      "event": "Culver City, United States",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 10180.0,
      "decimal_year": 1971.926027,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:46:36",
      "athlete": "Michiko Gorman",
      "nationality": "United States",
      "date": "December 2, 1973",
      "event": "Culver City, United States",
      "source": "IAAF, ARRS",
      "notes": "The ARRS notes Gorman's extended time as 2:46:37",
      "seconds": 9996.0,
      "decimal_year": 1973.917808,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:46:24",
      "athlete": "Chantal Langlacé",
      "nationality": "France",
      "date": "October 27, 1974",
      "event": "Neuf-Brisach, France",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 9984.0,
      "decimal_year": 1974.819178,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:43:54.5",
      "athlete": "Jacqueline Hansen",
      "nationality": "United States",
      "date": "December 1, 1974",
      "event": "Culver City, United States",
      "source": "IAAF, ARRS",
      "notes": "The ARRS notes Hansen's extended time as 2:43:54.6",
      "seconds": 9834.5,
      "decimal_year": 1974.915068,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:42:24",
      "athlete": "Liane Winter",
      "nationality": "West Germany",
      "date": "April 21, 1975",
      "event": "Boston Marathon",
      "source": "IAAF",
      "notes": "Disputed (point-to-point).",
      "seconds": 9744.0,
      "decimal_year": 1975.30137,
      "status": "Listed / disputed"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:40:15.8",
      "athlete": "Christa Vahlensieck",
      "nationality": "West Germany",
      "date": "May 3, 1975",
      "event": "Dülmen",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 9615.8,
      "decimal_year": 1975.334247,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:38:19",
      "athlete": "Jacqueline Hansen",
      "nationality": "United States",
      "date": "October 12, 1975",
      "event": "Nike OTC Marathon, Eugene, United States",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 9499.0,
      "decimal_year": 1975.778082,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:35:15.4",
      "athlete": "Chantal Langlacé",
      "nationality": "France",
      "date": "May 1, 1977",
      "event": "Oiartzun, Spain",
      "source": "IAAF",
      "notes": "",
      "seconds": 9315.4,
      "decimal_year": 1977.328767,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:34:47.5",
      "athlete": "Christa Vahlensieck",
      "nationality": "West Germany",
      "date": "September 10, 1977",
      "event": "Berlin Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 9287.5,
      "decimal_year": 1977.690411,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:32:29.8",
      "athlete": "Grete Waitz",
      "nationality": "Norway",
      "date": "October 22, 1978",
      "event": "New York City Marathon",
      "source": "IAAF",
      "notes": "Disputed (short course).",
      "seconds": 9149.8,
      "decimal_year": 1978.805479,
      "status": "Listed / disputed"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:27:32.6",
      "athlete": "Grete Waitz",
      "nationality": "Norway",
      "date": "October 21, 1979",
      "event": "New York City Marathon",
      "source": "IAAF",
      "notes": "Disputed (short course).",
      "seconds": 8852.6,
      "decimal_year": 1979.80274,
      "status": "Listed / disputed"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:31:23",
      "athlete": "Joan Benoit",
      "nationality": "United States",
      "date": "February 3, 1980",
      "event": "Auckland, New Zealand",
      "source": "ARRS",
      "notes": "",
      "seconds": 9083.0,
      "decimal_year": 1980.090164,
      "status": "ARRS progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:30:57.1",
      "athlete": "Patti Catalano",
      "nationality": "United States",
      "date": "September 6, 1980",
      "event": "Montreal, Canada",
      "source": "ARRS",
      "notes": "",
      "seconds": 9057.1,
      "decimal_year": 1980.680328,
      "status": "ARRS progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:25:41.3",
      "athlete": "Grete Waitz",
      "nationality": "Norway",
      "date": "October 26, 1980",
      "event": "New York City Marathon",
      "source": "IAAF",
      "notes": "Disputed (short course).",
      "seconds": 8741.3,
      "decimal_year": 1980.81694,
      "status": "Listed / disputed"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:30:27",
      "athlete": "Joyce Smith",
      "nationality": "United Kingdom",
      "date": "November 16, 1980",
      "event": "Tokyo, Japan",
      "source": "ARRS",
      "notes": "",
      "seconds": 9027.0,
      "decimal_year": 1980.874317,
      "status": "ARRS progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:29:57",
      "athlete": "Joyce Smith",
      "nationality": "United Kingdom",
      "date": "March 29, 1981",
      "event": "London Marathon",
      "source": "ARRS",
      "notes": "",
      "seconds": 8997.0,
      "decimal_year": 1981.238356,
      "status": "ARRS progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:25:28",
      "athlete": "Allison Roe",
      "nationality": "New Zealand",
      "date": "October 25, 1981",
      "event": "New York City Marathon",
      "source": "IAAF",
      "notes": "Disputed (short course).",
      "seconds": 8728.0,
      "decimal_year": 1981.813699,
      "status": "Listed / disputed"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:29:01.6",
      "athlete": "Charlotte Teske",
      "nationality": "West Germany",
      "date": "January 16, 1982",
      "event": "Miami, United States",
      "source": "ARRS",
      "notes": "",
      "seconds": 8941.6,
      "decimal_year": 1982.041096,
      "status": "ARRS progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:26:12",
      "athlete": "Joan Benoit",
      "nationality": "United States",
      "date": "September 12, 1982",
      "event": "Nike OTC Marathon, Eugene, United States",
      "source": "ARRS",
      "notes": "",
      "seconds": 8772.0,
      "decimal_year": 1982.69589,
      "status": "ARRS progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:25:28.7",
      "athlete": "Grete Waitz",
      "nationality": "Norway",
      "date": "April 17, 1983",
      "event": "London Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 8728.7,
      "decimal_year": 1983.290411,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:22:43",
      "athlete": "Joan Benoit",
      "nationality": "United States",
      "date": "April 18, 1983",
      "event": "Boston Marathon",
      "source": "IAAF",
      "notes": "Disputed (point-to-point).",
      "seconds": 8563.0,
      "decimal_year": 1983.293151,
      "status": "Listed / disputed"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:24:26",
      "athlete": "Ingrid Kristiansen",
      "nationality": "Norway",
      "date": "May 13, 1984",
      "event": "London Marathon",
      "source": "ARRS",
      "notes": "",
      "seconds": 8666.0,
      "decimal_year": 1984.363388,
      "status": "ARRS progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:21:06",
      "athlete": "Ingrid Kristiansen",
      "nationality": "Norway",
      "date": "April 21, 1985",
      "event": "London Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 8466.0,
      "decimal_year": 1985.30137,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:20:47",
      "athlete": "Tegla Loroupe",
      "nationality": "Kenya",
      "date": "April 19, 1998",
      "event": "Rotterdam Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 8447.0,
      "decimal_year": 1998.29589,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:20:43",
      "athlete": "Tegla Loroupe",
      "nationality": "Kenya",
      "date": "September 26, 1999",
      "event": "Berlin Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 8443.0,
      "decimal_year": 1999.734247,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:19:46",
      "athlete": "Naoko Takahashi",
      "nationality": "Japan",
      "date": "September 30, 2001",
      "event": "Berlin Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 8386.0,
      "decimal_year": 2001.745205,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:18:47",
      "athlete": "Catherine Ndereba",
      "nationality": "Kenya",
      "date": "October 7, 2001",
      "event": "Chicago Marathon",
      "source": "IAAF, ARRS",
      "notes": "",
      "seconds": 8327.0,
      "decimal_year": 2001.764384,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Standard",
      "time": "2:17:18",
      "athlete": "Paula Radcliffe",
      "nationality": "United Kingdom",
      "date": "October 13, 2002",
      "event": "Chicago Marathon",
      "source": "IAAF, ARRS",
      "notes": "First \"World's Best\" recognized by the International Association of Athletics Federations. The ARRS notes Radcliffe's extended time as 2:17:17.7",
      "seconds": 8238.0,
      "decimal_year": 2002.780822,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Mixed",
      "time": "2:15:25",
      "athlete": "Paula Radcliffe",
      "nationality": "United Kingdom",
      "date": "April 13, 2003",
      "event": "London Marathon",
      "source": "IAAF, ARRS",
      "notes": "First world record for the women's marathon ratified by the International Association of Athletics Federations. The ARRS notes Radcliffe's extended time as 2:15:24.6",
      "seconds": 8125.0,
      "decimal_year": 2003.279452,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Women only",
      "time": "2:17:42",
      "athlete": "Paula Radcliffe",
      "nationality": "Great Britain",
      "date": "April 17, 2005",
      "event": "London Marathon",
      "source": "IAAF",
      "notes": "",
      "seconds": 8262.0,
      "decimal_year": 2005.290411,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Women only",
      "time": "2:17:01",
      "athlete": "Mary Jepkosgei Keitany",
      "nationality": "Kenya",
      "date": "April 23, 2017",
      "event": "London Marathon",
      "source": "IAAF",
      "notes": "",
      "seconds": 8221.0,
      "decimal_year": 2017.306849,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Mixed",
      "time": "2:14:04",
      "athlete": "Brigid Kosgei",
      "nationality": "Kenya",
      "date": "October 13, 2019",
      "event": "Chicago Marathon",
      "source": "IAAF",
      "notes": "",
      "seconds": 8044.0,
      "decimal_year": 2019.780822,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Mixed",
      "time": "2:11:53",
      "athlete": "Tigst Assefa",
      "nationality": "Ethiopia",
      "date": "September 24, 2023",
      "event": "Berlin Marathon",
      "source": "World Athletics",
      "notes": "First woman to break the 2:12:00 barrier in the marathon.",
      "seconds": 7913.0,
      "decimal_year": 2023.728767,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Women only",
      "time": "2:16:16",
      "athlete": "Peres Jepchirchir",
      "nationality": "Kenya",
      "date": "April 21, 2024",
      "event": "London Marathon",
      "source": "World Athletics",
      "notes": "",
      "seconds": 8176.0,
      "decimal_year": 2024.303279,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Mixed",
      "time": "2:09:56",
      "athlete": "Ruth Chepng'etich",
      "nationality": "Kenya",
      "date": "October 13, 2024",
      "event": "Chicago Marathon",
      "source": "World Athletics",
      "notes": "First woman to break the 2:11:00 and 2:10:00 barriers in the marathon. Chepng'etich was banned on 23 October 2025 for three years for the presence and use of hydrochlorothiazide, though achievements and records pre-dating the 14 March 2025 sample stand.",
      "seconds": 7796.0,
      "decimal_year": 2024.781421,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Women only",
      "time": "2:15:50",
      "athlete": "Tigst Assefa",
      "nationality": "Ethiopia",
      "date": "April 27, 2025",
      "event": "London Marathon",
      "source": "World Athletics",
      "notes": "",
      "seconds": 8150.0,
      "decimal_year": 2025.317808,
      "status": "World Athletics progression"
    },
    {
      "category": "Women",
      "race_type": "Women only",
      "time": "2:15:41",
      "athlete": "Tigst Assefa",
      "nationality": "Ethiopia",
      "date": "April 26, 2026",
      "event": "London Marathon",
      "source": "World Athletics",
      "notes": "",
      "seconds": 8141.0,
      "decimal_year": 2026.315068,
      "status": "World Athletics progression"
    }
  ]
}