Mammoth 50K · Trail
Mammoth 50K
Mammoth Lakes, CA · Sep 26, 2026
Next edition
September
Overview
- Distance
- 50K
- Course shape
- Loop
- Elevation gain
- 7.0k ft
- Gain / mile
- 225 ft
- High point
- 11,053 ft
- Cutoff
- 12 hours
What this race is really like
RaceBound insight
Mammoth 50K is a 50K loop trail race in Mammoth Lakes, CA. It averages roughly 225 ft of climbing per mile. The high point sits near 11,053 ft, so altitude is a real factor.
Built from official course data
Where it gets hard
The entire race averages above 9,100 feet and combines 7,000 feet of gain with technical alpine footing.
Editorial summary · not an official race claim and not runner consensus
Terrain
- Terrain
- singletrack, rocky technical, pumice, alpine, high altitude
Climbing
- Total gain
- 7.0k ft
Altitude
Relevance: high
- High point
- 11,053 ft
- Average
- 9,100 ft
Aid stations
- Aid stations
- 6
Night running
Night running is not expected for most finishers.
Entry and registration
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