Rocky Mountain Slam

SEP
25
2026
A multi race ultramarathon series that culminates with the Bear 100 in Logan, UT on September 25, 2026, requiring completion of at least four 100 mile races including the Bear 100.
Fri 25 Sep 2026
400 miles

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Rocky Mountain Slam - September 25, 2026

The Rocky Mountain Slam is a series-ending event held in Logan, UT, on September 25, 2026, at 1400 E. 350 S. The event forms the final race of the Rocky Mountain Slam series and is associated with the Bear 100.

The Rocky Mountain Slam began in the early 2000s as a regional counterpart to other multi race series. Early editions centered on a core group of 100 mile races and in 2003 the Bighorn 100 was added as an option. The series saw several organizational changes over time: in 2019 Ouray 100 substituted for Hardrock 100 when Hardrock was not held, the series was not held in 2020 because of COVID 19, and a revised Rocky Mountain Slam V2.0 was announced in 2022.

Under the V2.0 format, runners must complete at least four total races with the Bear 100 as the mandatory final race. Optional races that can count toward the series include Scout Mountain 100, Bighorn 100, Hardrock 100, Leadville 100, Wasatch Front 100, Ouray 100, Wyoming Range 100, High Lonesome 100, and Crazy Mountain 100. Scout Mountain 100 was added in 2024; High Lonesome 100 and Crazy Mountain 100 were added in 2026. The series does not maintain a formal overall time record; an informal summation of a runner's fastest four runs, including the Bear 100, is noted. Registration to enter the series is required and registration for this event closed July 15, 2026. Visit the organization's website for the most recent information.

400 mi
Rocky Mountain Slam Series (4x100 Miles)
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