Mammoth Bar Trail Runs
Mammoth Bar Trail Runs offer a challenging half marathon with significant elevation on steep OHV trails.
Race Date
Sep 6, 2026
Location
Auburn, CA
Quick facts
- Date
- Sunday, September 6, 2026
- Location
- Auburn, California
- Distance
- Half marathon (13.1 mi) + 6.2 Miles
- Course
- Loop Course
- Terrain
- Trail
- USATF certified
- Not listed
Highlights
Atmosphere
The Experience
The Mammoth Bar Trail Runs plunge runners into the rugged beauty of Auburn, California's Middle Fork American River Canyon. This event is not for the faint of heart, taking place on the steep, challenging single-track and double-track OHV trails of Mammoth Bar.
Expect significant vert with steep climbs and descents, offering more elevation gain per mile than many standard races. Runners will experience the raw beauty of the American River Canyon, with views that reward the effort.
Established in 2025, this race is organized by Skybreaker Racing under the Singletrack Running umbrella. While specific finisher numbers and repeat runner rates are not yet established for this new event, its location in the 'Endurance Capital' and its demanding course promise a memorable challenge for trail runners.
Race-provided description
"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!
Logistics
Race Day
Sunday, September 6, 2026
Start Time
8:00 AM
Giveaway
T-Shirt
Start Location
Old Foresthill Rd, Auburn, CA, 95603
Course Info
Course Type
Loop Course
Terrain
trail
Scenery
Lake River
Surface
Dirt Trail
Difficulty
Hilly
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
Quality Score
first year
no finisher counts yet
small race — neutral
needs a few years of results
3 timing sources
no finisher data yet
no winner time yet
typical high 94°F
Race Day Weather
5-year historical avgStart (Low)
63°
Afternoon (High)
94°
Hot conditions — adjust pace expectations, prioritize hydration
0.0"
Precipitation
8 mph
Wind
37%
Humidity
Frequently asked
When is the Mammoth Bar Trail Runs?
The Mammoth Bar Trail Runs is held on Sunday, September 6, 2026, starting at 8:00 AM.
Where does the Mammoth Bar Trail Runs take place?
It takes place in Auburn, California.
What distances does the Mammoth Bar Trail Runs offer?
The half marathon (13.1 miles), plus 6.2 Miles.
Is the Mammoth Bar Trail Runs course flat and good for a PR?
The Mammoth Bar Trail Runs is a hilly, loop course course.
HalfRuns editorial — independent, no paid placement.
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