Trail Running calendar near Denver 2025-2026

Take on the Silver Rush 50 in Leadville, Colorado, a scenic trail and dirt road 50 mile mountain challenge with about 7,500 feet of climb and a high point near 12,024 feet. Top finishers can earn a Leadville Trail 100 qualifier coin.

Barr Trail Mountain Race is a 12.6-mile summer mountain running event along Pikes Peak. The course starts at Cog Railway Station in Manitou Springs (6,570 ft), ascends Barr Trail to Barr Camp at 10,200 ft, then turns, descends, and finishes..

Pikes Peak Ultra invites trail runners to Colorado Springs with 20K to 50 mile courses, and the 50K and 50 mile routes summit Mt Rosa. Rugged granite trails, big elevation and epic mountain views await.

The Summit 200 is a rugged 200 mile loop around Summit County Colorado, climbing about 40,000 feet on high alpine trails. Capped at 100 and requiring a prior 100 mile finish, it rewards experienced runners with a scenic high altitude test.

Join the Wild West Relay, a scenic point to point 200 miles across Colorado from Fort Collins to Steamboat Springs. Run solo or with teams from 1 up to 12 people as you tackle mountain passes, open roads and big western views.

Event overview The Sheep Mountain Trail Runs is the 12th annual event held in Fairplay, Colorado, with the Start/Finish at the Town of Fairplay Beach. The race has a runner capacity of 300 and a time limit of 16 hours. The course sits at an..

The Lory Summer Trail Series will take place in Bellvue from Wednesday 5 August 2026 to Wednesday 26 August 2026. You can run between 5 and 12 kilometers.

Run the Rockies Trail Race in Frisco, Colorado offers 5k, 10k, and half marathon distances on the scenic Frisco Peninsula trails, with views of Dillon Reservoir and the Ten Mile Range. The start and finish are at the Frisco Nordic Center. T..

The Byers Peak Stampede Half Marathon will take place in Winter Park on Saturday 22 August 2026. You can run between 5 and 21 kilometers.

The Leadville Trail 100 Mile Run will take place in Leadville on Saturday 22 August 2026. You can run 100 miles.

Front Range Ultra Dayze invites 200 runners to tackle a flat two mile loop along River's Edge in Loveland with multi day timed and classic ultra options. On site camping, communal meals, and a welcoming vibe.

Challenge yourself on the Cirque Series at Arapahoe Basin on September 5, 2026 in Keystone, Colorado. This scenic 9.4 mile mountain course with 2,211 ft of climbing delivers steep, technical trail and big alpine views in a capped field.

Ned Ned Run in Nederland Colorado blends scenic trail and road running through the foothills, offering a half marathon, 10K and fun 5K for all abilities. Family friendly and costumes encouraged, with leashed dogs welcome in the 5K.