Trail Running calendar near Red Feather Lakes 2026-2027

Trail races on the Spring Creek trail start and finish near the gazebo on Spring Creek Road. Options include a 9.5 mile loop with significant early climbing and a 5K out and back; the event is cupless and includes awards plus a raffle.

Repeating 2 km out and back laps on the Thumb Open Space trail in Estes Park. Participants collect a poker chip at each turnaround and the most chips wins during a sunup to sundown timeframe; 35 spots and a $100 entry fee.

Alpine ultramarathons in State Forest State Park between the Never Summer and Medicine Bow ranges. Options include 100 km, 60 km or both, with high elevation terrain, staffed aid stations and limited cell service.

An overnight team relay covering 200 miles and 36 legs from Fort Collins to Steamboat Springs, crossing two mountain passes. Multiple team categories are offered and teams choose between supplying volunteers or donating to Windsor Gives.

A mountain trail event in Winter Park, CO offering 50K, 21K, and 10K courses across high alpine singletrack with significant elevation gain, staffed aid stations, age group awards, and town finish at Rendezvous Event Center.

Two Brothers Up and Down in Idaho Springs offers two uphill out and back races on mixed dirt and paved roads, with steep sections and an aid station on the 10k. Both races start and finish at Courtney Riley Cooper Park.

A four-race midweek trail series at Lory State Park in August 2026 offering 5k to 12k courses, timed by chip with series points and end of series awards. Pizza and beverages follow each race and vintage shirts are available.

Two day mountain bike and trail running event in Steamboat Springs on August 8 and 9 2026. Multiple distances from a 52 mile solo bike to 26.2 and 13.1 mile runs, with proceeds supporting local youth and trail organizations.

A hilly 10K trail race at Lory State Park in Bellvue, Colorado, featuring about 1,700 feet of elevation gain, a 100-runner cap, chip timing, and post-race pizza and beverages as part of a midweek series.

A four‑race midweek trail series at Lory State Park in August 2026 offering 5k, 10k and 12k courses with varied elevation. Series and per-race registration, post-race food and drinks, and end-of-series awards for top points scorers.

Run the scenic Medicine Bow Rail Trail and Lake Owen at high elevation in Wyoming's national forest. This event offers both marathon and half marathon distances, all on a historic pathway. The 2026 edition is scheduled for August 15.

A mostly dirt and trail race along Boulder Reservoir in Boulder, Colorado, with about 200 feet of elevation gain. Distances range from a 10K to a full marathon, plus a relay option.

Trail races around Standley Lake in Westminster, CO, with five distances on packed dirt trails and lake and mountain views. Organized by Aravaipa Running; registration closes Aug 10.

Summit Grays and Torreys Peaks in this 8.8 mile Colorado endurance event. Participants must carry a 20lb dry load while tackling 4,101 feet of elevation gain.

A hilly trail 5k at Lory State Park on August 18, 2026 with about 700 feet of elevation gain, a 100-runner cap, chip timing, and pizza and beverages provided after the race.

A four‑race midweek trail series at Lory State Park in August 2026 offering 5k, 10k and 12k courses with varied elevation. Series and per-race registration, post-race food and drinks, and end-of-series awards for top points scorers.

The Rocky Mountain Milestone Challenge will take place in Granby from Wednesday 19 August 2026 to Sunday 23 August 2026. You can run between 13 and 100 miles.

Experience a high altitude trail run through the Rocky Mountains on 100 percent unpaved roads and trails. This dog friendly event in Fraser supports children facing cancer through the Shining Stars Foundation.

Trail races at Curt Gowdy State Park near Cheyenne, Wyoming, across granite boulders, pine forests and open meadows. Distances include a 4 mile and an 8 mile, with a half marathon planned for 2027; the event is cupless with aid stations.

A cross country meet at Spring Canyon Park in Fort Collins on August 22, 2026, featuring seven races including high school 5k, a community 5k on the same course, and middle school 1.5 mile races. Proceeds support Rocky Mountain High School..