Trail Running calendar near Winter Park 2026-2027

Trail races in Aspen offering 50K, marathon and heavy half-marathon on dirt trails with high alpine sections and significant elevation gain. Limited support and remote aid stations; finish-day festival and local Duck Derby take place at Rio..

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.

A mountain trail race in Vail on August 1, 2026 featuring an uphill 6.9 km course with about 2,013 feet of gain, singletrack and doubletrack terrain, an aid station, post race refreshments, awards and a raffle.

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 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.

Four midweek trail races in August at Lory State Park near Fort Collins, offering 5k to 12k courses, chip timing, series points, post-race pizza and vintage shirts, with awards for top series finishers.

A two day running event in Snowmass Village on August 7 and 8, 2026 offering 3.76k, 5k and a single 10k plus an 18.76k challenge. Finishers receive a free New Belgium brew and event medals; proceeds support local nonprofits.

Trail races of 5k, 10k and half marathon on Frisco Peninsula trails with single track, lakeshore finishes, chip timing, aid stations for the 10k and half, and post race food and beer for participants 21 and older.

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.

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 10 km trail race at Lory State Park's Eltuck Picnic Area with 1,700 feet of elevation gain and a 100-runner cap. The event includes pre-attached timing chips, no on-course aid, and post-race pizza and beverages.

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.

STRS #5 Carter Park Scurry in Breckenridge on August 12 2026 offers short and long course entries across adult youth and non-binary divisions with published entry fees and a course map.

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 ultras from Roxborough State Park to Sharptail Trailhead featuring sustained climbs, technical singletrack, and a long runnable finish, with full aid support and an emphasis on land stewardship.

Westminster Trail Race at Standley Lake on August 15, 2026 offers five distances from 5K to 50K on 100% dirt trails with out and back course formats, elevation gain, on course support, and parking at Wayne Carle Middle School.

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.

Leadville Trail 10K on August 16, 2026 is a 6.2-mile out-and-back on paved and dirt roads using the opening and closing sections of the LT100 Run course. The race features one turnaround aid station, branded on-course nutrition, and multipl..

A hilly trail 5k at Lory State Park Eltuck Picnic Area in August 2026, capped at 100 runners and timed by chip. Post-race pizza and beverages are provided and the race is part of an August series of trail events.