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100K trail races 2026: calendar, courses & results

100K: 11 upcoming trail races. Every race links to its course profile, terrain breakdown and results. Full calendar

RaceDateLocationDistanceD+
Ultra-Trail Mount Yun by UTMB · DMY 100KOctober 16, 2026Zhonghe Square, Mount Yun, Linfen, Shanxi, China97.0km4356m+
Mallorca by UTMB · Camins de Pedra SecaOctober 30, 2026Spain104km—
Kullamannen by UTMB · Sprint Ultra 100KOctober 30, 2026Sweden104km—
Ultra-Trail Shudao by UTMB · DSD 100KNovember 6, 2026China100km—
Obala Ultra Trail · 108kmNovember 7, 2026Dekani, Slovenia108km4000m+
Ultra-Trail Kosciuszko by UTMB · Kosci100November 26, 2026Australia107km—
HOKA Chiang Mai Thailand by UTMB · Elephant 100November 28, 2026Thailand96.0km—
Oman by UTMB · Jabal ClassicDecember 10, 2026Al Hamra, Oman103km5000m+
Tarawera Ultra-Trail by UTMB · Tarawera 100KFebruary 13, 2027New Zealand100km—
Chianti Ultra Trail by UTMB · Chianti Ultra TrailMarch 18, 2027Italy100km—
Istria 100 by UTMB · Istria 100 by UTMB® 110KApril 3, 2027Buzet, Croatia111km4200m+

Free tools

GPX AnalyzerUpload any GPX and see the elevation profile, climbs, descents and terrain mix.Race Pace CalculatorFinish time, checkpoint splits and fueling from the real course profile.Trail FinderExplore trail gradients on the map and build a loop from any point.Trail Race CalendarUpcoming trail races by country and distance, with course data.Terrain ChallengesCompare your terrain to the world's hardest courses.
Trail races by countryItaly·Spain·Serbia·United States·Slovenia·Croatia
By distance50K·50-mile·100-mile