Trail Running calendar near Mills 2026-2027

A mountain running event in Medicine Bow National Forest offering 24-hour, 12-hour, and single-summit formats; laps are about 9 miles with nearly 3,000 feet of vertical gain and a single basecamp aid station.

Trails-based event on Casper Mountain offering an 8 mile two-lap race or a Backyard Ultra that repeats a 4.12–4.20 mile loop hourly until one runner remains, held at the Casper Mountain Trails Center.

An overnight time based trail event on Casper Mountain offering 12 hour and 4 hour solo options plus a 12 hour four person relay, staged from the Nordic stadium near the Trails Center.

This self supported 36 hour event in Casper features a 3 mile out and back loop on the Platte River Trail. Participation is free and limited to 10 runners who manage their own supplies and tracking.