Trail Running calendar near Como 2025-2026

The Byers Peak Stampede Half Marathon & 5K Run takes place in Fraser, Colorado, nestled in the Rocky Mountains about 60 miles from Denver. The event features a challenging half marathon and a 5K race, both primarily on dirt roads and trails with stunning mountain views. The half marathon starts at a..

The Westminster Night Trail in Westminster, Colorado, is a vibrant night trail running event held at Standley Lake. Celebrating its 12th year, it offers distances of 50K, 35K, half marathon, 10K, and 5K, all on 100% packed dirt trails featuring a mix of single-track and bike paths. Runners experienc..

Presented by Elevated Dental and Hyperice, the Arrowhead Half Marathon & 5K is part of the Vail Trail Running Series in Arrowhead Village, Edwards, CO, with starts and finishes at Arrowhead Village Lawn. The half covers 13 miles (20.9K) with about 2,844 feet of elevation gain, finishing atop Bachelo..

The Staunton Rocks! Marathon & Half is a trail running event held at Staunton State Park in Pine, Colorado, featuring a marathon (26.3 miles, 4,500 ft elevation gain) and a half marathon (13.1 miles, 2,200 ft gain). The course is primarily singletrack (90%) with some dirt roads, set at an average el..

Bluffs 8K Trail Run is a timed, 8-kilometer trail race held in Bluffs Regional Park in Lone Tree, Colorado. The course starts and finishes near the Prairie Sky Park parking lot, following a fine crushed-gravel route with rugged, steep sections and sweeping views of rolling hills. The event offers fo..

The Grand Traverse Mountain Run is a 40-mile, point-to-point ultra from Crested Butte to Aspen, Colorado, climbing the Elk Mountains with more than 6,000 feet of elevation gain. It follows the Grand Traverse Backcountry Ski race route and is run as a fundraising event for Crested Butte Nordic. The c..

The Rock Hawk Trail Races take place at Philip S. Miller Park in Castle Rock, Colorado, featuring distances of 50K, 25K, 10K, and 5K. The event is held on the scenic, rolling trails of Miller Park and the Ridgeline Trail systems, offering a course that is not overly technical but still challenging a..

The Calarat Challenge Trail Running Festival takes place in Jamestown, Colorado, at the Cal-Wood Education Center, a nonprofit dedicated to outdoor education. Held over Labor Day weekend, the event features multiple trail races including a half marathon, 10K, 5K, Kids 1K, and combination races like..

American Heroes Run takes place in Longmont, Colorado, on a flat, fast loop course of about 1.05 miles. The event features multiple distances, including a 100-mile race (with a 30-hour cutoff), a 24-hour option, marathon, half-marathon, 9.11-mile, and 5K, plus shorter time-limited runs. The atmosphe..

The HRCA Wildcat Mountain Trail Races, held in Littleton, Colorado, offer a scenic and challenging trail running experience through the HRCA Backcountry Wilderness Area. Participants can choose from a 10-mile or 10-kilometer course, both featuring 100% dirt trails with varied terrain and stunning mo..

RexRun For PAWSitivity is a charity trail event held at the Arapahoe County Fairgrounds in Aurora, Colorado. It offers a 5K Trail Run, a Family 5K Trail Walk (dogs welcome), and a Kids 1-mile Run/Walk. The course is a dirt trail, with a dog-friendly environment and a family-friendly festival atmosph..

Devil on the Divide is a trail ultramarathon held in Empire, Colorado, offering two distances: 50K and 22K. The 100% dirt, point-to-point courses traverse stunning, remote terrain with views of Clear Creek County and the Continental Divide, reaching elevations above 13,000 feet. The 50K features abo..

Cirque Series returns to Arapahoe Basin, Colorado, for a high-alpine mountain race. On White River National Forest trails above Keystone, the course runs about 9 miles with roughly 2,411 feet of elevation gain, starting at Mountain Goat Plaza at the base of A-Basin. Racers ascend via summer road to..

The Breckenridge Oktoberfest 5K is a festive trail run held in historic downtown Breckenridge, Colorado, as part of the annual Oktoberfest celebration. Scheduled for Saturday, September 13, 2025, the 5K course winds through the scenic Town of Breckenridge Trails, showcasing beautiful fall foliage an..

The Snow Mountain Ranch Trail Running Festival, held at the YMCA of the Rockies in Granby, Colorado, offers a scenic and challenging trail running experience with race distances of 50K, 33K, Half Marathon, 10K, and 5K. Set amidst rolling hills, golden aspen groves, and mountain vistas, the courses f..

Trail Sisters Women's Half Marathon & 10k is a women-focused trail running event in Buena Vista, Colorado, set in the Rocky Mountains along the Arkansas River. The lineup includes a 13.1-mile Half Marathon and a 10k (6.2 miles). The course twists through sagebrush and ponderosa pines, rewarding runn..

Nestled in Old Town Nederland, Colorado (elevation around 8,236'), NedNed Trail Fest offers a long-running trail challenge with three race options: a Half Marathon (about 13.3 miles with roughly 1,408 feet of elevation gain on dirt roads and single-track trails), a 10K (about 6.3 miles on dirt roads..

The Pony Express Trail Run will take place in Woodland Park on Sunday 14 September 2025. You can run between 8 and 16 miles.

Lead King Loop 25K Run is a mountain race in Marble, Colorado, set in the heart of the Elk Mountains. The 25-kilometer loop winds through Lead King Basin, past the iconic Crystal Mill, and through the historic Town of Crystal. Participants can run, walk, or hike, with an 8-mile Quarry Climb option a..

The Frederick Pack Burro Race is an annual 10K event held in Frederick, Colorado, celebrating the town's Miners Day heritage. The race follows a scenic course starting downtown at Fifth and Oak Streets, heading north along a trail through a tunnel to the Frederick Recreation Area, looping around Mil..