Trail Running Calendar Colorado 2024-2025

The Greenland Open Space Pack Burro Races take place in Larkspur, Colorado, offering two distances: an 8-mile race following all WPBA rules and a 4-mile introductory course where packs are optional. Participants must be 14 years or older and are encouraged to secure a burro partner before registerin..

The Flat and the Furious trail run at Barr Lake State Park in Brighton, CO offers a 30K and 15K race on a flat and fast course with stunning lake views and minimal elevation gain. The event, part of the Endurance Race Series, takes place on July 14, 2024, starting and finishing at the Nature Center...

The Last Call Fifties trail run has now been rebranded as the Silverheels Trail Runs, featuring various distances including 10-Mile, 18-Mile, 60k, 50-Mile, 100k, and 100-Mile options. The event, held annually in July, underwent a refresh in 2024 with new start and finish locations, distances, and br..

The High Lonesome 100 is a challenging endurance race in the Colorado Rocky Mountains, featuring 23,500' of vertical gain and reaching an elevation of 13,150'. The course runs through beautiful singletrack, including the National Continental Divide and Colorado Trails, two ghost towns, five alpine p..

The Ouray 100 Mile Endurance Run is a challenging trail run with approximately 42,000 feet of elevation gain in the beautiful San Juan Mountain range in Colorado. Participants will face fourteen climbs and finish at Fellin Park where they can enjoy the Ouray Hot Springs. The event requires participa..

The Audi Power of Four Trail Run in Aspen Snowmass offers three distances: 50K, 25K, and 10K. The event provides a scenic mix of trails across the mountains, with varying start times and prices. Participants can enjoy the beautiful landscapes while challenging themselves in their chosen distance. Fo..

The Spring Creek Memorial Trail Run is a 9.5-mile race held in memory of Patty Brenner Hagberg, featuring a scenic loop on primitive trail, two track, single track, and forest service road. The course gains ~1,750 ft. in the first 4 miles, with a challenging rocky and narrow single track section. Th..

The Dynafit 5K & 10K trail run takes place on July 20, 2024, at the top of Gondola One on Vail Mountain, CO, starting at 8 a.m. The challenging course offers stunning views of the Vail Valley, the Gore Range, and blooming wildflowers. The 10K course has an elevation gain of nearly 1,200 feet, while ..

The Box Canyon Trail Races in Telluride, CO offer two challenging courses: the Bridal Veil 30k and the Bear Creek 10 Mile. The Bridal Veil 30k takes runners through high alpine meadows, past iconic landmarks, and finishes with a descent back into Telluride. The Bear Creek 10 Mile race showcases stun..

The Fox on the Run trail run offers both a 5-mile and a 10-mile race starting and finishing near the Turkey Springs Guard Station in Pagosa Springs, CO. The 5-mile course follows the Turkey Springs Trail loop, while the 10-mile course includes an additional out-and-back loop on various trails. Parti..

The Barr Trail Mountain Race is a historic summer mountain running event in Manitou Springs, Colorado. The 12.6-mile course starts at the Cog Railway Station and ascends Pikes Peak's Barr Trail before finishing at the Barr Trailhead. The race is part of The Garden to Peak Challenge, where participan..

The Summit 200 is a 200-mile trail run around Summit County, Colorado, featuring stunning hiking trails, forest roads, and sections of pavement. The route offers breathtaking beauty and significant elevation changes, with the lowest altitude over 9000 feet and sections surpassing 13,000 feet. The ev..

The Royal Gorge Whitewater Festival Trail Runs will take place in Canon City from Friday 26 July 2024 to Saturday 27 July 2024. You can run between 5 and 12 miles.

The Never Summer 100km trail run takes place in State Forest State Park, running between the Never Summer Mountains and the Medicine Bow Mountains. The race offers stunning views of various mountain ranges and alpine lakes along the way. Participants can expect a challenging course with a variety of..

The Pikes Peak Ultra trail run takes place in Bear Creek Regional Park, Colorado Springs, offering distances of 50 miles, 50K, 30K, and 20K. The course showcases some of the best trails in the area, running on crushed granite typical of Colorado Springs. Runners will enjoy views of Pikes Peak and th..

The Grand Mesa Ultras offer a challenging trail running experience on the Grand Mesa in Colorado, featuring a 50 Miler, 55K, and 30K race. Participants can expect rocky technical climbs, fast forest single tracks, wildflowers, alpine meadows, lakes, streams, and stunning views. The event encourages ..

The Creede 100 trail run takes place in the historic mining town of Creede, Colorado. The race offers stunning views of the San Juan Mountains, with participants climbing to over 12,000 feet and running along pristine single track trails. Runners will also cross the Continental Divide and experience..

The New Castle Dirty Dozen Trail 10K will take place in New Castle on Friday 2 August 2024. You can run 10 kilometers.

The Emerald Mountain Epic is a premier single track race experience taking place on August 3rd & 4th, 2024. The event offers mountain bike races on August 3rd, including solo and duo relay options, and trail running races on August 4th, with full marathon, half marathon, and 10K distances available...

The Sheep Mountain Ultras is an annual trail run event taking place on August 3, 2024, in Fairplay, CO. The event offers three distances: 50-Mile, 50k, and Half Marathon, with a time limit of 16 hours and a runner capacity of 300. Participants can expect a challenging course with an average elevatio..