Mammoth Trail Fest

Mammoth Lakes, United States • 18-21 Sep 2025

Mammoth Trailfest, held in Mammoth Lakes, California, is a multi-day trail running event set in the stunning Eastern Sierra. The festival features a variety of races including the challenging 50K and 26K single-loop mountain courses with significant elevation gains, the Dragon's Back Ascent climbing from 8,500' to over 11,000', the nighttime tenkay glowstick run, and a kids' 1K. The event combines competitive racing with community-focused activities such as live entertainment, storytelling, and local food, fostering an inclusive atmosphere. Participants enjoy well-supported courses, unique medals, swag, and a vibrant festival experience celebrating trail running and mountain culture. Visit the organization's website for the most recent information.

Race information

50 km
7000 m+
50k
26 km
26k
Dragon Ascent
Kids Run
Mammoth Triple
Tenkay
Visit the organization's website for the most recent information.
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