50 miles of alpine singletrack in Colorado's fall color capital
Other trail races within 46 miles
A challenging alpine 50-mile loop through Colorado's Gunnison National Forest, traversing singletrack trails that wind through wildflower meadows, dense aspen groves blazing with fall color, and exposed mountain ridgelines reaching 11,291 feet. Starting and finishing at Crested Butte's community school, the course delivers 8,300 feet of climbing on some of Colorado's most celebrated trail terrain. Timed for peak autumn conditions, runners face late-September mountain weather that can shift from clear skies to cold and stormy within hours.
Experienced ultrarunners
Crested Butte, CO, United StatesSeptember 26, 2026
| Location | Mile | Elevation |
|---|---|---|
Start/Finish Start | 0.0 | 8,878 ft |
Farris Creek Aid Station Aid Station | 6.0 | 9,334 ft |
Walrod Aid Station Aid Station | 13.0 | 9,262 ft |
Farris Creek Aid Station Aid Station | 23.0 | 9,334 ft |
Teocalli Aid Station Aid Station | 29.5 | 9,272 ft |
Teocalli Aid Station Aid Station | 41.0 | 9,272 ft |
Farris Creek Aid Station Aid Station | 44.0 | 9,334 ft |
Finish Finish | 50.0 | 8,878 ft |
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Late September in Crested Butte brings highly variable conditions. Daytime temperatures at race elevation are typically in the 40–60°F range, cooler on exposed ridgelines above 10,000 feet. Overnight lows can dip below freezing. Afternoon thunderstorms are possible, and early-season snowfall is not unheard of in late September. Runners should prepare for conditions to change rapidly throughout the day; back-of-pack 50 Mile runners will likely finish after sunset.
Entire course runs above 8,800 feet; 50 Mile peaks at 11,291 feet on exposed ridgelines
Late September Colorado mountain weather can shift from sunny to snow within hours
Nighttime temperatures regularly drop below freezing above treeline; back-of-pack runners will finish after dark
Afternoon thunderstorms common on exposed ridgelines in late summer/early fall
No required gear specified
No recommended gear specified
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