Trail Running calendar near Larkspur 2026-2027

A three day Leadville training camp that walks and runs major sections of the Leadville Trail 100 course, pairs guided day and night runs with recovery and nutrition support, and includes panels, Q&A sessions and a provided running kit.

A trail race at Garden of the Gods on June 20, 2026, offering 100K, 50K, and 35K courses that feature significant climbing, multiple aid stations, and a start/finish at Rock Ledge Ranch in Colorado Springs.

Experience up to three miles of messy fun at the Colorado National Speedway. Navigate obstacles by crawling wading and sliding through the mud with friends and family during this unique event in Dacono.

Test your strength at this exclusive obstacle course event in Peyton featuring a three lap 3K race and a one mile kids run. Navigate rigs, rope climbs, and heavy carries in a small field of only fifty athletes.

A one-day festival in Lyons on June 20, 2026 that combines gravel and road bike rallies, several trail runs, live music, camping and on-site pools. Featured formats include a 100K enduro, a 50K rally and a 5 mile run.

A multi-event Colorado series of four half marathons and a 25K across summer 2026, organized by HAL Sports with races run by local nonprofits. Participants may register for three, four, or all five events.

A community-focused trail festival in Gold Hill, Colorado, with 28K, 12K, 5K and Kids 1K races, a shuttle from Boulder, and proceeds supporting wildfire preparedness for the town.

At 10,600 feet in Alma, Colorado, Race in the Clouds is a June 25 to 28 Dirt Fest featuring mountain biking, trail running, off road duathlon, youth races and meadow camping, with USA Triathlon sanctioning and age group awards.

A 26.4 mile trail marathon and a 15.46 mile Heavy Half on Leadville mining trails, topping out at Mosquito Pass 13,185 feet. Both races feature multiple aid stations, specified parking and shuttle arrangements, and the marathon serves as an..

Chase the Moon is an overnight fixed time trail event in Highlands Ranch, Colorado with solo 12, 6 and 3 hour races, a 50K and three and five person relays. Runners complete marked loops on dirt trails with aid stations and drop bag support..

Experience a half marathon in the mountains of Nederland Colorado. This event features a significant elevation gain of 4226 feet with the summit always in view.

A 5k trail race at Alderfer Ranch in Evergreen, CO with a course through Alderfer/3 Sisters Park. Shuttle service runs from Wulf Rec Center and on-site vendors, games, and food are available. Internet registration is not yet open.

A professional pack burro race in Cripple Creek during Donkey Derby Days, featuring a 6 mile urban course, chip timing, checkpoint support, animal welfare rules, on-site activities and monetary awards.

A July 4 community 3.1 mile run from Pueblo city park pavilion along the Arkansas River Trail, with swag bags, costume prizes, finisher medals, music and booths; proceeds support the Southern Colorado Runners Club.

A 5K run/walk in Winter Park, Colorado following the Fraser River Trail from Gondola Plaza to the Rendezvous Event Center, with an after party featuring refreshments, awards and prize giveaways.

A downtown Leadville Fourth of July 5K held above 10,000 feet, with adult fees rising from $25 to $30 after July 2 and free entry for youth 17 and under. Proceeds support local youth athletics and recreation.

Experience high altitude trail running through historic Colorado ghost towns and mines at over 10000 feet. Choose from distances ranging from 10 miles to 100 miles in the scenic South Park Valley.

A high-altitude 50-mile out-and-back on dirt roads through Leadville’s historic mining district, with 7,503 feet of gain, seven aid stations, and LT100 qualifier coins available to finishers.

Experience the STRS Horseshoe Gulch Grind in Breckenridge with short and long course options. This trail event offers categories for adults and youth starting from the Blair Witch Trailhead.

A community trail event at Ranch Camp with organized 5k and 10k courses, water stations, medical support, sliding-scale registration, and post-race tie-dye and crafts for finishers.