September 26, 2026 · Logan to Fish Haven, Utah, USA
100 mi (161 km)RunningUltra

Bear 100 Mile Endurance Run

Mountain Fall. Cache Valley.

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Logan to Fish Haven, Utah, USAMountain Fall. Cache Valley.
Course intelligence

Know the course before you race it.

Terrain

Point-to-point through the Bear River Range and Wellsville Mountains. 22,000 ft of climbing through Bear Lake and Cache Valley terrain.

Conditions

Late September in northern Utah: 30–70°F. Fall aspen colors peak during race weekend. Night temperatures drop well below freezing at elevation.

Aid Stations

20 aid stations; crew access at 12. Logan Canyon and Bear Lake sections have excellent crew access.

Key Challenge

The overnight cold at altitude (many sections above 8,000 ft) creates severe calorie burn just maintaining core temperature. Athletes who under-fuel in cold night sections develop hypothermia risk on top of glycogen depletion.

Fueling questions

Nutrition answers for Bear 100 Mile Endurance Run.

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