gravel

Mammoth TUFF

Mammoth Lakes, CA, United States · 19 September 2026

Difficulty: 4/5 — Very hard

Mammoth TUFF is a challenging gravel race in California, offering approximately 143km with 2250m of elevation gain over a mix of rough gravel and paved sections. Riders will face a significant 16-mile climb and high-altitude conditions.

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Distances
66km · 108km · 143km
Elevation
2,250 m
Surface
gravel, tarmac
Typical W/kg
2.8–3.8

Rider fit

Who it's for

This race is for experienced gravel riders who thrive on challenging terrain, significant climbing, and high-altitude conditions.

Who will struggle

Riders unaccustomed to sustained climbing, rough gravel, or high-altitude racing will likely find this event very demanding.

Training focus

Training should prioritize sustained climbing, high-intensity gravel riding, and, if possible, altitude acclimation.

Are you ready for this race?

Compare your W/kg to see how you stack up against this race's typical level — and which races fit you best right now.

FAQs

What are the available distances for Mammoth TUFF?+

The event offers three distances: 41 miles (66km), 67 miles (108km), and 89 miles (143km).

What is the terrain like for the Mammoth TUFF race?+

The course consists of a mix of gravel (63%) and paved sections (37%), described as rough terrain with steep climbs, including a notable 16-mile ascent and the Red Rock Canyon climb.

What is the total elevation gain for the main course?+

The longest 89-mile (143km) course features a total elevation gain of 7500 feet (2250 meters).

Is Mammoth TUFF a qualifier for the UCI Gravel World Championships?+

Yes, the 89-mile (143km) distance is the official qualifier for all younger categories, and the 67-mile (108km) distance qualifies men and women over 50. The 41-mile (66km) distance is not a qualifier.

What is the altitude of Mammoth Lakes?+

Mammoth Lakes, where the race is held, is situated at 7,880 feet (2,400 meters) above sea level.

When is the Mammoth TUFF race held?+

The Mammoth TUFF race is an annual event, scheduled for Saturday, September 19, 2026.

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