Mammoth Bar Trail Runs
Decision scores
Six 0–100 scores telling you, at a glance, who this race is for.
Best for
About the Race
"Standard distance. Mammoth vert." Mammoth Bar Trail Runs take place on the single-track and double-track trails of Mammoth Bar OHV Area in Auburn State Recreation Area, in the Endurance Capital of Auburn, California. Mammoth Bar is known for its steep climbs and descents, as well as it's beautiful American River Canyon views. These are not your average courses. You get more vert per dollar! Yay!
Course Profile
Course profile data unavailable for this race.
Course features
Accessibility & inclusion
Vibe & community
History & past results
Past finisher times and year-over-year participation will appear here once the organizer publishes them.
Reviews
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Common questions
How hard is the Mammoth Bar Trail Runs Half Marathon?
We don't have a verified elevation profile yet — check the organizer's course map for the climb breakdown.
What should I wear?
Dress for ~10°F warmer than the standing temperature once you start running. Throwaway long-sleeve at the start, gloves and a hat for sub-50°F mornings, singlet plus visor when it climbs above 60°F. The race-day forecast above is the source of truth closer to the date.
When does it sell out?
No published deadline. Most races raise the entry fee in tiers and can sell out without warning — sign up early if you're committed.
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- Same distance, statewide: All Half Marathon races in California
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