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Mammoth Trailfest
50km5026km26

Mammoth Trailfest 50k

50.0km·2133m+
September 20
Mammoth Lakes,
United States
itra
The plan will appear closer to the race. For now, check a previous season's plan.

Race Pace Calculator · GPX Analyzer · Trail Finder

Other races: United States

  • HOKA Pacific Trails California by UTMB · Pacific Trails 50KNovember 13, 2026 · 50.0km
  • Dead Horse Ultra · Dead Horse 50KNovember 14, 2026 · 50.0km · 855m+
  • Dead Horse Ultra · Dead Horse 30KNovember 14, 2026 · 30.0km · 527m+
  • Dead Horse Ultra · Dead Horse 50 MileNovember 14, 2026 · 80.5km · 1492m+
  • Dead Horse Ultra · Dead Horse 15KNovember 14, 2026 · 15.0km · 284m+

Read

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  • Downhill Running Muscle Damage: Why Descents Wreck Quads

Full calendar: United States50K trail race calendar

About Mammoth Trailfest 50k

Mammoth Trailfest 50k is the 50.0km ultra trail at Mammoth Trailfest 2025 (Mammoth Lakes, United States). The race starts on September 20, 2025.

Course

The course climbs 2133m+. With 43m/km of climbing, this is a rolling, mostly runnable course.

This page has a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for Mammoth Trailfest 50k.

Other distances of Mammoth Trailfest 2025Mammoth Trailfest 26k (26.0km)