Trail Running Calendar Colorado 2024-2025

The Continental Divide Trail Run offers a challenging 50K, 16-mile, and 5-mile race through aspen and pine forests with stunning views of the Yampa Valley. The 16-mile race includes over 3,500 ft. of elevation gain, reaching a high point of 10,420 ft. The 50K race features approximately 5,500 ft. of..

Participants can join the 12th Annual Race Standley Lake event in Westminster on August 24, 2024, offering 13.1, 10K, and 5K distances suitable for competitive, intermediate, or novice runners. The course features a mix of packed dirt trails, single track, and some minimal bike path, with stunning l..

The Staunton Rocks! Marathon & Half Marathon takes place in Staunton State Park in Colorado's Front Range Mountains. The event offers a challenging yet accessible trail running experience with flowing trails, gradual climbs & descents, and technical features. Runners will enjoy scenic views, histori..

The Rock Hawk Trail Races take place in Castle Rock, CO, offering distances of 50K, 25K, 10K, and 5K on the scenic trails of Miller Park & Ridgeline Trail systems. The trails are described as thrilling and rolling, providing a challenge for both new and experienced trail runners with stunning views...

The Summer Trail Series at Lory State Park offers a fun and low-key opportunity for both new and experienced trail runners to participate in shorter midweek races. The races range from 5k to 12k in distance, with the fourth race taking place on the fast and flat Valley Trail. Chip timing will be use..

The Front Range Ultra Dayze is a 100-hour ultra-running event in Loveland, CO, featuring various timed and distance-based races. The event aims to bring together ultra-runners from across the U.S. for a festival of ultra-running. Runners are allowed to camp at the park for free throughout the event...

The Lory Summer Trail Series will take place in Bellvue on Thursday 29 August 2024. You can run between 5 and 12 kilometers.

The Creede Mountain Run offers a challenging 22-mile course starting in Creede and reaching elevations up to 12,500 feet along the Continental Divide. Runners must reach Allen's Crossing within 1.5 hours to continue on the 22-mile course. The 50k course follows the main course of the 22-mile run, wi..

The Grand Traverse Mountain Run is a 40-mile ultra marathon from Crested Butte to Aspen, Colorado, with over 6,000′ of elevation gain. It follows the route of the Grand Traverse Backcountry Ski race and is operated as a fundraising event for Crested Butte Nordic. The registration for the 2024 race w..

The American Heroes Run is a special event held to honor the heroes of 9/11. Participants can choose from various race options including a 100-mile run, 24-hour run, marathon, half-marathon, 9.11-mile run, and a 5K run/walk. The event takes place on a beautiful, flat, fast 1.05-mile loop course in L..

The Devil on the Divide trail run offers a 50K and 22K race in Empire, Colorado on Saturday, September 7, 2024. The event promises breathtaking views of Clear Creek County and the Continental Divide, with the 50K course reaching an altitude over 13,000 feet and featuring over 6,500 feet of climbing...

The Black Squirrel Half Marathon takes place on the scenic trails of Lory State Park in Bellvue, CO. The course offers stunning views of Horsetooth Reservoir, Fort Collins, the Great Plains, and the Rocky Mountains. Runners will experience a variety of runnable yet technical terrain, including a cha..

The Cirque Series at Arapahoe Basin is an 8.8-mile trail run with 2,411 feet of vertical gain. The race offers various prize categories for Sport, Expert, and Pro levels, with cash prizes and gear awarded to top finishers. The course takes runners through scenic views of the East Wall and the old to..

The Imogene Pass Run will take place in Telluride on Saturday 7 September 2024. You can run between 0 and 0 kilometers.

The Alberta Peak Challenge will take place in Pagosa Springs on Saturday 7 September 2024. You can run between 0 and 0 kilometers.

Participants can join the 5K Trail Run presented by Les Schwab Tires to support trail maintenance and Arapahoe County Open Spaces. The event welcomes walkers of all ages and is a timed race. The 2024 run is scheduled for September 12, with specific times and location to be announced. Interested vend..

The Run Rabbit Run trail run takes place in Steamboat Springs, CO, offering both 50 and 100-mile races through the stunning mountains and fall colors of the Routt National Forest. The 50-mile race starts at the Steamboat Springs ski area and climbs up to Mount Werner before crossing the Continental ..

The Dynafit Meadowgold 5K & 10K Trail Run is the seventh and final race in the Vail Trail Running Series, presented by the Town of Minturn. The event takes place on Meadow Mountain in Minturn, Colorado, offering a challenging course with beautiful scenery. Participants can expect technical singletra..

The Ouray 50 Mile Endurance Run is a challenging trail run set in stunning mountain scenery in Ouray, CO. With an elevation gain of 23,582 feet, this race offers highly technical and unforgiving trails, making it more difficult than most 100 milers. Participants are required to complete 8 hours of v..

The Nedned Trail Fest will take place in Nederland on Saturday 14 September 2024. You can run between 5 and 21 kilometers.