Trail Running calendar near Golden 2025-2026

North Fork 50 Mile/50K is an ultramarathon set in the Colorado mountains just southwest of Denver, near Buffalo Creek. The event offers two distances: 50 miles and 50K. The course is 100% soft-surface, comprised mostly of singletrack trails with a few short sections of double-track road.Runners clim..

The Great Divide Ultra, held June 6-7, 2026 in Divide, Colorado, is part of Revenant Running’s festival. Distances offered are 100 mile, 100k, 50k, and 25k. The 100‑mile course is six 14.8‑mile loops plus a 10.5‑mile loop through Mueller State Park on smooth single/double‑track trails, delivering sw..

Summits Trail Runs, the 2nd Annual edition of the Human Potential Running Series, unfolds at Granby Ranch Resort in Colorado’s Rocky Mountains (Granby, CO). The race weekend offers several distances: Elevation Challenge (a 32-hour ascent loop on East Peak), 50k, Marathon, Half Marathon, and 6 Miles,..

Aiden's Adventure 5k takes place on Saturday, June 6, 2026, in Colorado Springs, CO. The event includes in-person and virtual options and donates all proceeds to Care and Share of Southern Colorado and Catamount Institute. Event activities include rock painting, a butterfly release, and carnival ga..

Crazy Legs 10k+ Trail Run is held at Devil’s Backbone Open Space in Loveland, Colorado, starting and finishing in the parking lot. The loop course runs through Hidden Valley, Hunter Loop, Laughing Horse Loop, and Wild Loop for roughly 10k+, with a low-key atmosphere. The route is flour-arrow marked..

Ring the Springs is a trail running event on Saturday, June 20, 2026, at Rock Ledge Ranch at Garden of the Gods, 3105 Gateway Road, Colorado Springs, CO 80904. The event offers three distances: 100K 50K 35K The 35K field has an entrant limit of 400 runners. Registration closes on Monday, June 15...

Timberview Trail Run is held at Lory State Park in Bellvue, Colorado, just outside Fort Collins. The event offers three distances: 5K, 5 Mile, and 10 Mile (the 10M is a double loop of the 5M). Runners traverse scenic forest trails with views of Horsetooth Reservoir and the foothills; the 5K is begin..

The Race in the Clouds - Alma Dirt Festival is a multi-sport outdoor event held in Alma, Colorado in 2026. The festival base is Alma Cemetery Meadow, at about 10,600 ft elevation and roughly half a mile from downtown Alma. The event program includes mountain biking, trail running, an off-road duath..

The Silverheels Trail Runs take place July 10-11, 2026, with start/finish operations based at the Como Roundhouse in Como, CO. Distances offered include: 100-Mile 100k 50-Mile 60k 19-Mile 10-Mile Runner capacity is limited: 100 combined for the 100-Mile and 100k, and 200 combined for the 50-Mile,..

Barr Trail Mountain Race is a 12.6-mile summer mountain running event along Pikes Peak. The course starts at Cog Railway Station in Manitou Springs (6,570 ft), ascends Barr Trail to Barr Camp at 10,200 ft, then turns, descends, and finishes at Barr Trailhead. The race is CUP-less and runners should..

Pikes Peak Ultra, in Colorado Springs, Colorado, offers 20K, 30K, 50K, and 50 Mile races. Starting at Bear Creek Regional Park, the course climbs via High Drive into Cheyenne Canon, then traverses the Seven Bridges Trail before routing up Pipeline Trail. Much of the route is crushed granite, with sw..

The Summit 200 is a single, non-repetitive 200‑mile loop around Summit County, Colorado, centered near Frisco. The mostly non-urban route uses single-track trails, forest roads, and some rec paths and pavement, with the lowest altitude above 9,000 ft and sections climbing toward 12,800 ft, plus 12 f..

The Sheep Mountain Trail Runs is the 12th annual event held in Fairplay, Colorado, with the Start/Finish at the Town of Fairplay Beach. The race has a runner capacity of 300 and a time limit of 16 hours. The course sits at an average elevation over 10,600 ft and takes place on the western slope of..

Run the Rockies Trail Race in Frisco, Colorado offers 5k, 10k, and half marathon distances on the scenic Frisco Peninsula trails, with views of Dillon Reservoir and the Ten Mile Range. The start and finish are at the Frisco Nordic Center. The course blends single-track and dirt roads, looping counte..

Eternal Damnation Backyard Ultra is a last-man-standing backyard ultra scheduled for April 18, 2026. The event uses a repeating-lap format: each lap is 4.167 miles, and runners must complete each lap within one hour. The event continues in this format until only one runner remains. The event is lim..