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  2. Ladakh Marathon - Wikipedia

    en.wikipedia.org/wiki/Ladakh_Marathon

    The Ladakh Marathon is held at a height of 11,500 to 17,600 ft. Acclimatization is the foremost issue at this height. Altitude sickness can occur at this height due to lack of oxygen. The Ladakh Marathon has a long pre-marathon work-out schedule to train the participants, helping them acclimatizing to the high altitude and hilly conditions.

  3. International Association of Ultrarunners - Wikipedia

    en.wikipedia.org/wiki/International_Association...

    The International Association of Ultrarunners (IAU) is the world governing body of ultra running, race events longer than the marathon distance of 42.2 km. It regulates and sanctions the World Championships for various ultramarathon distances, and tracks world records in ultra distance races approved by IAU.

  4. Barkley Marathons - Wikipedia

    en.wikipedia.org/wiki/Barkley_Marathons

    The Barkley Marathons is an ultramarathon trail race held each year in Frozen Head State Park in Morgan County, Tennessee, United States.Described as "The Race That Eats Its Young", it is known for its extreme difficulty, purposefully difficult application process, and many strange traditions, having been completed only 26 times by 20 runners since 1995.

  5. Marine Corps Marathon - Wikipedia

    en.wikipedia.org/wiki/Marine_Corps_Marathon

    Known as "The People's Marathon", the MCM is open to all runners ages 14 and above and is the largest marathon that does not offer prize money. The 50K Ultramarathon race is the largest in North America. [2] The event typically occurs on the final Sunday in October, a few weeks before the United States Marine Corps' birthday on November 10.

  6. Skyrunner World Series - Wikipedia

    en.wikipedia.org/wiki/Skyrunner_World_Series

    Race Values: Races are characterised by their technicality, speed, intensity and extreme terrain. Altitude (average and maximum reached), peak reach, running on snow/glacier, grade II climbing difficulty and increased elevation percentage are other factors also taken into account when defining a Sky Race.

  7. 4 Deserts - Wikipedia

    en.wikipedia.org/wiki/4_Deserts

    The 4 Deserts Ultramarathon Series is an annual series of four 250-kilometer (155-mile) races across deserts around the globe. [1] The races were recognized as the world's leading endurance footrace series by TIME magazine in 2009 and 2010, [ 2 ] as the "Ultimate test of human endurance". [ 3 ]

  8. IAU 100 km World Championships - Wikipedia

    en.wikipedia.org/wiki/IAU_100_km_World_Championships

    The IAU 100 km World Championships have been held annually since 1987, at different locations, and is organized by the International Association of Ultrarunners (IAU). [1] [2] Due to lack of sponsorship, the 2013 event, planned for Jeju Island, South Korea, [3] was cancelled and the 2014 event, originally due to be held at Daugavpils, Latvia, was held instead in Doha, Qatar.

  9. 2025 USA Outdoor Track and Field Championships - Wikipedia

    en.wikipedia.org/wiki/2025_USA_Outdoor_Track_and...

    The 2025 USA Outdoor Track and Field Championships will be held at Hayward Field in Eugene, Oregon from July 31–August 3, 2025. [2] They will serve as USA Track & Field 's (USATF) national championships in track and field for the United States. [ 3 ]