Trail Running calendar near Steamboat Springs 2026-2027

Alpine ultramarathons in State Forest State Park offering a 100 km and 60 km trail courses with large elevation gain, high ridgelines, stocked aid stations and limited cell service.

Mountain Fair 4 Miler in Carbondale follows Prince Creek Road into town with a finish at Sopris Park. Shuttle service to the start is available and proceeds benefit Carbondale Arts.

A single 200 mile loop around Summit County Colorado across high mountain trails and forest roads, with about 40,000 feet of elevation change, live GPS tracking, 12 aid stations and a small capped field of runners.

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.

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 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.

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.

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 community Backyard Ultra at Loudy Simpson Park in Craig, Colorado, where runners repeat a 4.167-mile loop each hour until one remains. A single-loop Citizens Race offers a one-time course experience along the Yampa River.

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.

Trail-based chip timed half marathon and 5K near Fraser, Colorado, on unpaved roads and trails, with aid stations and proceeds supporting the Shining Stars Foundation.

A mountain trail half marathon and a mostly downhill 5.6K in Arrowhead, Colorado, featuring shuttle access, multiple aid station stops on the half, awards and postrace refreshments.

Trail races held from the Torian Plum Lawn in Steamboat Springs offering 50k, 16 mile and 5 mile options across high alpine terrain with cupless aid stations, limited crew access, and awards including finisher mugs and age group prizes.

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.

A 5k trail run at Copper Mountain starting at 11,000 feet, held during the Union Peak Festival with music and festival activities afterward.

The Cirque Series at Arapahoe Basin on Sept 5, 2026 is a 9.4 miles mountain trail race with 2,211 ft of ascent on approved White River National Forest trails. The field is capped at 600 runners and includes a branded hat, bib and medal.

Experience a high altitude trail run starting at 10,000 feet on Rabbit Ears Pass. Runners navigate a mix of forest roads and single track trails with 1,200 feet of elevation change through scenic Colorado terrain.

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..