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Rocky Mountain Slam

Logan, United States • 27 Sep 2025

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 Front 100, Ouray 100, and Wyoming Range 100.

Runners must complete at least four races, with two options available per month from June to September. There is no formal overall time record; instead an informal tally tracks a runner’s fastest four runs (including Bear). A series registration is required to participate.

Scout Mountain 100 was added in 2024. Visit the organization's website for the most recent information.

United States Utah Logan

Race information

Website Registration
Visit the organization's website for the most recent information.
Trail runs nearby

Bear 100 Endurance Run

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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 carr..

UTMB Index

Backyard Ultra of Northern Utah

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Backyard Ultra of Northern Utah takes place at Mantua Reservoir in Mantua, Utah. The centerpiece is a precisely 4.1‑mile loop on the Mantua Reservoir Trail—no out‑and‑backs—designed to keep miles pouring in with seamless yard-to-yard transitions. The trail is flat and fast, with firm dirt and some g..