Trail Running calendar near Empire 2026-2027

STRS #4 - Tom's Baby on July 29, 2026 takes place at Tom's Baby Trailhead in Breckenridge, CO, offering short and long course entries with adult, youth, and non-binary categories and published entry fees.

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.

Sheep Mountain Trail Runs in Fairplay Colorado features 50 mile, 50K and Half Marathon courses on high‑elevation mountain trails with maps, aid stations, and midrace drop options.

High alpine trail running in Aspen with 50K, marathon and heavy half marathon options and a finish festival at Rio Grande Park.

Mountain trail races in Winter Park CO on August 1 2026 with 50K, 21K and 10K courses through high-alpine singletrack and town finishes.

A steep 4.3 mile uphill trail race from Vail Village to Mid Vail with significant elevation gain, on course aid stations, finish food and age group awards.

Two Brothers Up and Down in Idaho Springs on August 1, 2026 features steep out and back courses on dirt and pavement with major elevation gain for 5k and 10k.

A pack burro race in Buena Vista Colorado on Aug 2 2026 with 13.1 mile and 7.3 mile courses offered both with and without burros. Burro teams must meet specific equipment and conduct rules and finishers receive a gift and a meal.

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.

A two-day multi-distance run and hike in Snowmass Village offering 3.76k, 5k and a single 10k with an 18.76k challenge and a post-race New Belgium brew.

Trail races of 5K, 10K, and half marathon on Frisco Peninsula trails with lakeshore finishes at Dillon Reservoir on August 8, 2026.

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 community benefit trail event in Castle Rock with a 5K and a 1 Mile Walk raising funds for a family affected by spinal muscular atrophy.

Trail run at Rampart Reservoir with 8 mile and 16 mile options on single track and rocky sections. Entry is limited to 150 and registration closes August 5, 2026.

A traditional pack-burro race in Leadville, Colorado at over 10,000 feet where each team is one runner and one burro carrying mining tools. The long course is about 21 miles and a shorter 6 to 8 mile course is planned.

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.

Trail run on August 12, 2026 at Carter Park in Breckenridge offering short and long course entries with adult youth and non binary categories.

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.

Two fully supported trail ultras in Roxborough State Park with technical singletrack, significant elevation gain, and a finish at the Sharptail Trailhead.