California · Mammoth Triple · tenkay · Dragon Ascent
Mammoth Trailfest
Mammoth Trailfest is a Mammoth Triple, tenkay and Dragon Ascent event held in Mammoth Lakes, California. It was last held on September 25, 2026 and is usually run in September; the next date hasn't been announced yet. About 732 runners take part across all distances.
- Usually held
- September
- Location
- Mammoth Lakes, CA
- Field size
- ~732 runners
Race details
- Last held
- September 25, 2026
- Usually held in
- September
- Location
- Mammoth Lakes, California
- Distances
- Mammoth Triple, tenkay, Dragon Ascent
- Field size
- About 732 runners
- Course
- 2400 ft gain
- Registration
- mammothtrailfest.com
Registration, course & weather
- Registration status
- Registration status as last checked September 22, 2026: not announced
- Course profile — Dragon Ascent
- Point-to-point course; Trail surface; 2400 ft gain (estimated from third-party elevation data)
- Course profile — 50K
- Loop course; Mostly trail, some road; 7000 ft gain (estimated from third-party elevation data)
- Course profile — 26K
- Loop course; Mostly trail, some road
- Course profile — Tenkay
- Loop course; Trail surface; 800 ft gain, 800 ft loss (estimated from third-party elevation data)
- Course profile — Mammoth Triple
- Loop course; Trail surface
About the Mammoth Trailfest
Mammoth Trailfest in Mammoth Lakes, CA.
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Mammoth Trailfest: common questions
- When is the Mammoth Trailfest?
- The next date hasn't been announced in the listing yet. The race is usually held in September. Check the organiser's website for the official date.
- Where is the Mammoth Trailfest held?
- In Mammoth Lakes, California.
- What distances does the Mammoth Trailfest offer?
- Mammoth Triple, tenkay and Dragon Ascent.
- How many people run the Mammoth Trailfest?
- About 732 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the Mammoth Trailfest?
- Registration is handled by the organiser at mammothtrailfest.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Mammoth Trailfest?
- Registration status as last checked September 22, 2026: not announced.
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