Trail Running calendar near Idaho Springs 2026-2027

MonsterDASH Louisville on Oct 25, 2026 offers a new half marathon plus 5k, 10k and a kids mile with costume contests, expo, and themed runner perks.

A Halloween themed 5k and 10k through historic downtown Erie and Coal Creek trails, with a kids Goblin Run and BOLDERBoulder qualifier status. The event supports the Erie Optimist Club as its primary fundraiser.

Four trail races across Colorado Springs parks with increasing distances and chip-timed series awards for runners who complete all four events.

Experience 13.1 miles of singletrack trails and hills in the Highlands Ranch Backcountry Wilderness Area. Enjoy custom medals and a post race pancake breakfast while competing for cash prizes in various categories.

Timed 6-, 12- and 24-hour running and relay events on a certified 1.0002 mile dirt loop at Colorado Youth Outdoors Swift Ponds in Fort Collins, with full-service aid every lap and locker-style lodge support nearby.

VO2Max 3K OCR in Colorado Springs on Nov 7, 2026 features an indoor/outdoor 3K course with 15 to 20 obstacles and finisher medals and t shirts.

Trail races at Starsmore Visitor & Nature Center on November 8, 2026, with chip-timed 4-mile and untimed 2.5-mile courses on Columbine Trail; proceeds support Friends of Cheyenne Cañon and leashed pets are allowed on the trail.

Trail races in Louisville Colorado offering a half marathon, 10K and 5K on dirt trails with views of the Flat Irons and on course aid stations.

Four trail races across Colorado Springs parks with increasing distances and chip-timed series awards for runners who complete all four events.

A winter trail event in Colorado Springs offering 50k, half marathon, and 10k courses that start at Bear Creek Regional Park. Trails include historic High Drive and Gold Camp Road with stocked aid stations and crew accessible points.

Celebrate the holiday with a scenic run in Buena Vista. Choose between a standard 5K race or a free 1 mile family fun run suited for all participants in Colorado.

The Sawmill Trail Runs will take place in Conifer on Saturday 5 December 2026. You can run 50 kilometers.

Limited to 40 runners on the Thumb Open Space trail in Estes Park, participants repeat 2 km laps with 540 ft gain and collect poker chips to record ascents.

A winter trail running weekend at Cheyenne Mountain State Park featuring timed ultras and looped distance races with a central aid and community focus.

A long-distance event on April 11, 2027 along the Poudre River Trail offering 50- and 100-mile solo and relay options through Bellvue, Fort Collins, Timnath, Windsor and Greeley.

Rattler Trail Race in Palmer Park, Colorado Springs on April 17, 2027 offers 5K, 10K, 25K and a 50K two loop course on singletrack with sandstone bluffs, technical sections and views of the city and Pikes Peak.

Trail races in Larkspur, Colorado offering four on site distances from 4 miles to a 50K ultra plus virtual options. Chip timing, technical shirts, and food and beer at the finish accompany soft dirt courses with Pikes Peak as a backdrop.

A road and trail running event in Garden of the Gods Park on May 1, 2027 offering 5K, 5 mile, and a 9.5 mile option with closed roads, multiple aid stations, and views of the park's iconic rock formations.

A women focused trail running event at Cheyenne Mountain State Park on May 8, 2027 offering distances from 4 mile to 50K across limestone, singletrack and ridgelines, with cupless aid stations and race packet pickup the day before.

Trail races near Fort Collins offering 25 and 50 mile options on mostly singletrack through Lory State Park and Horsetooth Mountain Park, featuring about 5,500 ft or 11,000 ft of vertical gain, staffed aid stations, and marked trails.