Trail Running calendar near Fort Collins 2026-2027

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..

The Evergreen Trail Race Series will take place in Evergreen on Saturday 22 August 2026. You can run between 5 and 11 miles.

A four-date midweek trail series at Lory State Park with races from 5k to 12k; the August 25 Eltuck Valley 12k is a mostly flat 12 km course with post-race pizza and beverages.

A community trail event at the Arapahoe County Fairgrounds on 08/29/2026 with a 5K run, a family 5K walk that allows leashed dogs, and a kids 1 mile plus demonstrations, vendors, and a pancake breakfast.

Run Like the Wind in Allenspark on August 29, 2026 features a 5K race, a 2K run/walk and a dog jog option. Proceeds benefit The Old Gallery and participating dogs are entered in an amateur dog show.

Multi-day ultrarunning event in Loveland, Colorado on a 2 mile loop with time-based options up to 100 hours and distance races to 200 miles. Continuous aid, chip timing, and camping are available.

Join the community for a 5K run or walk on a brand new dirt course at the North Arvada Middle School Athletic Complex. Support local high school racers before taking on this off road route yourself.

A load bearing endurance event at Staunton State Park on September 5, 2026. Routes range from 6.5 to 21.5 miles with loads from 10 to 40 lb and proceeds benefit the Special Forces Foundation.

A multi-distance running event in Longmont, CO on September 11-12, 2026, held on a 1.05-mile loop. Events range from a 100-mile race with a 30-hour cutoff to shorter runs, with aid stations, timing, and finish awards.

A longstanding Nederland, Colorado running event offering a 5K road run, a 10K trail, and a trail half marathon, with family-friendly features, on-leash dogs allowed in the 5K, and costume encouragement.

A one day trail running festival at YMCA of the Rockies in Granby, Colorado on September 12, 2026 featuring 50K, 33K, half marathon, 10K and 5K on dirt and grass trails with loop formats, aid stations, drop bag access and on site lodging an..

A 13.5 mile trail half around Lory State Park near Fort Collins with about 2,000 feet of climb, marked singletrack, aid stations, and a free one mile kids race.

Trail race in Empire, Colorado on September 12, 2026 offering 50K and 22K point-to-point courses on dirt single-track with high altitude views. The 50K exceeds 13,000 feet and requires prior ultra running experience.

A 10 mile out and back mountain run in Jelm, Wyoming with over 2000 feet of elevation gain, aid stations, and proceeds donated to Albany County Search and Rescue.

A community trail race on North Table Mountain near Golden, CO, offering 10 Mile and 5 Mile courses. Organized by BeyondHome to support families moving from homelessness to self sufficiency.

A day of youth and adult cross country races in Aurora, Colorado on September 20, 2026, featuring grass courses with small undulations, a creek crossing, and bale jumps; distances run from 2k youth races up to a 5k open race.

Experience the wild spaces of Northern Colorado with a weekend of trail races ranging from a half marathon to a 50 mile ultra through scenic forests and scout camp trails. Stay on site with available camping and community meals.

A two-day trail and bike event in Estes Park featuring 31-mile bike and run options, a 15-mile heavy half, and a 62-mile duathlon, with rugged trails, significant climbs, and aid stations supporting competitors.

A trail run and walk at Terry Bison Ranch in Cheyenne on September 26, 2026, offering distances from a half marathon to a kids run. Proceeds support cardiac and pulmonary rehab equipment and participants receive a 2026 event T shirt and bre..

A weekend of looped trail races at Bear Creek Lake Park near Lakewood CO offering 100K, 50 Mile, 50K, half marathon, 10K and 5K on mostly singletrack dirt.