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🏔️ Ultra Index
Races

Discover

FIND YOUR NEXT ULTRA

Browse ultra marathons by format, difficulty, geography, environment, and more.

Experience

Most Scenic 173 Best Organized 89 Strongest Community 112 Great First Ultras 32

By Format

100 Milers 33 100K Races 52 50 Milers 25 50K Races 29 Multi-Stage 21 Backyard Ultras 8 200+ Milers 6

By Difficulty

Your First Ultra 10 Moderate Ultras 35 Challenging Ultras 82 Most Brutal 60 Legendary Races 66

By Continent

Europe 81 North America 41 Asia 34 Africa 17 South America 14 Oceania 13

By Environment

Mountain Races 104 Alpine Ultras 45 Forest Ultras 41 High Altitude Ultras 25 Desert Ultras 21 Coastal Ultras 17 Flat Ultras 27 Fast Trail Races 40 Timed Events 5

Curated Collections

Highest DNF Rates 198 UTMB Series 19 Race Calendar 201