Hasetsune Cup - Japan Mountain Endurance RaceJPNJapan12–13 Oct202571.5kmDistfixed distance race1,269M 1,1171,117 menF 152152 women
Rick O'Donnell 8-hour Ultra ChallengeUSAUnited States12 Oct20258hTimefixed time race24M 1919 menF 55 women
Mile Madness Endurance Run 6h Sun RunUSAUnited States12 Oct20256hTimefixed time race1M 11 menF 00 women
Mile Madness Endurance Run 12h Sun RunUSAUnited States12 Oct202512hTimefixed time race1M 11 menF 00 women
Glacial Trail 50 km RaceUSAUnited States12 Oct202550kmDistfixed distance race92M 5757 menF 3535 women
Glacial Trail 50 Mile RaceUSAUnited States12 Oct202550miDistfixed distance race21M 1717 menF 44 women
Green Monster Trail Challenge 50KUSAUnited States12 Oct202550kmDistfixed distance race46M 3232 menF 1414 women
Hainesport Hundred 12 Hour Endurance Run SummerUSAUnited States12 Oct202512hTimefixed time race6M 33 menF 33 women
Hainesport Hundred 24 Hour Endurance Run SummerUSAUnited States12–13 Oct202524hTimefixed time race2M 22 menF 00 women
Midstate Massive 30 Mile Ultra TrailUSAUnited States12 Oct202530miDistfixed distance race65M 4444 menF 2121 women
Die Bergischen 5 KindergartenrundeGERGermany12–16 Oct2025· 5 stages176kmDistfixed distance race3M 11 menF 22 women
Die Bergischen 5 ErwachsenenrundeGERGermany12–16 Oct2025· 5 stages275kmDistfixed distance race11M 88 menF 33 women
Yukihashi to Beppu 100 kmJPNJapan11–12 Oct2025100kmDistfixed distance race2,855M 2,2732,273 menF 582582 women
Nelson Backyard Ultra - Cottonwood CountdownCANCanada11–12 Oct202526hTimefixed time race3M 11 menF 22 women
Krukes Ultra-Trail Challenge 12 lapsNORNorway11 Oct202550miDistfixed distance race4M 44 menF 00 women
Krukes Ultra-Trail Challenge, Last One StandingNORNorway11 Oct202532hTimefixed time race11M 1010 menF 11 women