Mammoth Bar Trail Runs
About this 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!
Pick your distance
Trail running
Half Marathon
Elevation gain is approximately 4,300 ft. Aid Stations: Castle Rock Aid: mile 2 F.D.L. Aid: mile 5 Castle Rock Aid: mile 11.3
10K
Elevation gain is approximately 1,900 ft. Aid Stations: Castle Rock Aid: mile 2 Castle Rock Aid: mile 4.5
Typical race-day weather
Based on 2 years of Open-Meteo archive data for this event's race dates in Auburn, plus the 3 days either side.
The sun rises at 6:38 AM and sets at 7:27 PM local time (PDT) in Auburn on September 6, 2026 — 12h 49m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
Reviews
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Results — Mammoth Bar Trail Runs
Other races near Auburn
Different organizers, within 40 miles, in the next three months
Auburn Santa Run/Walk 5k
Auburn Resolution Run
Heart of Cool Trail Run
City of Lincoln Huffin' for the Stuffin' Turkey Trot
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 12 Auburn events
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