Bear 100 Endurance Run

Logan, United States • 26 Sep 2025

The Bear 100 is a fall, 100-mile point-to-point ultramarathon from Logan, Utah to Bear Lake. It runs through the pines, golden aspens and red maples of the Wasatch-Cache National Forest and the Bear River Range, finishing at Bear Lake. The race is a Hardrock and Western States 100 qualifier and carries a UTMB Index rating.

Qualifiers require a 50-mile effort under 16 hours or any 100K, 100 or 200 miler under the race cutoff within a four-year window. Registration is limited, typically fills fast with a waitlist capped at 400. Participants must complete eight hours of service; The Bear 100 reaches its 27th anniversary. Visit the organization's website for the most recent information.

Race information

UTMB 100M
100 mi
The Bear 100
Visit the organization's website for the most recent information.
Trail runs nearby

Rocky Mountain Slam (RMS) is a Rocky Mountain ultra-running series anchored in Logan, Utah. The core format features 100-mile races with the Bear 100 as the mandatory finish. RMS V2.0 expands options to include Scout Mountain 100, Bighorn 100, Hardrock 100 (now optional), Leadville 100, Wasatch Fron..