Rocky Mountain Slam

Rocky Mountain Slam : Logan, UT · September 25, 2026

The Rocky Mountain Slam is a multi-race series associated with 100-mile mountain races, with the Bear 100 serving as the mandatory final event. The series appears on the event calendar for Logan, Utah on September 25, 2026.

The Slam began in the early 2000s as a regional series of mountain races. In 2003 Bighorn 100 was added to the list of qualifying races. Over time the format evolved: by 2019 substitutions were made among the qualifying races, and the series was not held in 2020 because of the COVID-19 pandemic. A revised format, called Rocky Mountain Slam V2.0, was announced in 2022. Subsequent additions to the eligible races include Scout Mountain 100 in 2024 and High Lonesome 100 and Crazy Mountain 100 in 2026.

Under the V2.0 format a runner must complete at least four races, and The Bear 100 is the only mandatory race. Eligible races 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. Many of these races use lotteries, and the revised series increases the number of options across June to September. The series requires registration of a runner who intends to compete, and an award is provided to finishers. Visit the organization's website for the most recent information.