Trail Running calendar near Brighton 2025-2026

North Fork 50 : Event details The North Fork 50 Mile/50K is scheduled for Saturday, May 30, 2026, in Buffalo Creek, Colorado. The start and finish are at the Buffalo Creek Clubhouse, 18050 S Buffalo Creek Rd, Buffalo Creek, CO 80470. Distan..

Enjoy alpine single track through meadows and aspen groves at Granby Ranch Resort with distances from 6 Mile to 50k and a unique Elevation Challenge scored by total climb rather than distance. Small field and stocked aid stations make for a..

Run smooth trails in Mueller State Park at the Great Divide Ultra on June 6 to 7, 2026, with looped distances from 25k to 100 mile. Enjoy big mountain views, crew friendly aid stations, and a welcoming festival vibe.

Run the Crazy Legs 10k+ at Devils Backbone Open Space in Loveland, Colorado, a scenic singletrack course with aid stations and lively local support. Limited spots remain and this is the event's final year, so grab your spot now.

Timberview Trail Run is held at Lory State Park in Bellvue, Colorado, just outside Fort Collins. The event offers three distances: 5K, 5 Mile, and 10 Mile (the 10M is a double loop of the 5M). Runners traverse scenic forest trails with view..

Event overview The Silverheels Trail Runs take place July 10-11, 2026, with start/finish operations based at the Como Roundhouse in Como, CO. Distances offered include: 100-Mile 100k 50-Mile 60k 19-Mile 10-Mile Runner capacity is limited:..

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..

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.

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.

Run the Rock Hawk Trail Races at Philip S. Miller Park in Castle Rock on August 29, 2026, with distances from a friendly 5K to a bold 50K. Enjoy rolling scenic trails, cup free aid stations and live tracking across the Miller Park and Ridge..

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.