Trail Running calendar near Morrison 2025-2026

The Byers Peak Stampede Half Marathon & 5K Run is an exciting running event set in the stunning Rocky Mountains, just 60 miles from Denver. Scheduled for August 23, 2025, the event features a challenging half marathon and a 5K run, both designed for athletes of all levels. The half marathon course p..

The Westminster Night Trail is a vibrant running event held at Standley Lake in Westminster, Colorado, celebrating its 12th year. Participants can choose from various distances, including 50K, 35K, half marathon, 10K, and 5K, all set against the stunning backdrop of the lake and mountains. The cours..

The Eltuck Valley 12K is part of the Lory Summer Trail Series, taking place at Lory State Park in Bellvue, Colorado. This event is designed for both novice and experienced trail runners, offering a fun and low-key atmosphere. The series includes multiple races, culminating in the 12K distance, which..

The Front Range Ultra Dayze is an exciting ultra-running event taking place in Loveland, Colorado, from August 28 to September 1, 2025. This festival features a variety of ultra-distance races, including 200-mile, 100-mile, and timed events ranging from 12 to 100 hours. Participants can camp for fre..

The American Heroes Run is a commemorative running event held in Longmont, Colorado, designed to honor the heroes of 9/11 and celebrate patriotism. Participants can choose from various race distances, including a 100-mile run, marathon, half-marathon, 9.11-mile run, and a 5K, among others. The event..

Devil on the Divide is a challenging trail running event held in Empire, Colorado, featuring two race distances: a 50K and a 22K. Participants will experience breathtaking views of Clear Creek County and the Continental Divide, with the 50K course reaching altitudes over 13,000 feet and involving ov..

The Cirque Series at Arapahoe Basin is a thrilling mountain running event scheduled for September 6, 2025. Participants will tackle a challenging 9.4-mile course with an elevation gain of 2,411 feet, starting from the base at 10,780 feet. The route features stunning views and a mix of established tr..

The HRCA Wildcat Mountain Trail Races, scheduled for September 6, 2025, in Littleton, Colorado, features a variety of events including a 10-mile race, a 10K, and a Kid's Race. The races start at the Douglas County East/West trailhead and traverse the scenic HRCA Backcountry Wilderness Area. Particip..

The Black Squirrel Half Marathon, scheduled for September 6, 2025, takes place in Lory State Park near Fort Collins, Colorado. This challenging 13.5-mile race features approximately 2,000 feet of elevation gain and descent, offering runners stunning views of Horsetooth Reservoir and the Rocky Mounta..

The Snow Mountain Ranch Trail Race, held at the YMCA of the Rockies in Granby, Colorado, is a scenic trail running festival featuring multiple race distances: 50K, 33K, Half Marathon, 10K, and 5K. Set against the stunning backdrop of the Rockies, participants can enjoy the vibrant fall colors and ch..

The MeadowGold 11K & 5K is a scenic running event organized by the Vail Recreation District, taking place in the picturesque Meadow Mountain area. This race offers participants the choice between two distances, catering to both competitive runners and casual participants. The event is designed to pr..

The Ned Ned Trail Fest is a celebrated running event held in Nederland, Colorado, featuring a variety of race options including a Half Marathon, 10K, and 5K. This family-friendly festival encourages participants to enjoy the scenic beauty of the area while challenging themselves on dirt roads and si..

The Pony Express Trail Run is a scenic trail running event held at Rampart Reservoir, featuring two distance options: 8.5 miles and 16 miles. Set at an elevation of over 9,000 feet, participants can enjoy beautiful single-track trails, creeks, and local wildlife amidst Colorado's autumn scenery. The..

The Pikes Peak Marathon, established in 1956, is the oldest continuously held marathon in the United States, featuring a challenging course that ascends from Manitou Springs, Colorado, to the summit of Pikes Peak at 14,115 feet and back, totaling 26.2 miles. This iconic race, along with its counterp..

The 24 Hours Of Palmer Lake will take place in Palmer Lake from Saturday 27 September 2025 to Sunday 28 September 2025.

The Bear Chase Race is an exciting endurance festival held at Bear Creek Lake Park in Lakewood, Colorado, featuring a variety of race distances including 100K, 50 Mile, 50K, Half Marathon, 10K, and 5K. This event is ideal for both novice and experienced trail runners, offering a mix of challenging t..

The West Line Winder is a scenic trail running event held in Buena Vista, Colorado, featuring 30K and 50K races. Set against the stunning backdrop of the Collegiate Peaks, participants can enjoy a mix of singletrack and forest roads, with significant elevation gain. This event caters to all levels o..

The Sawatch Ascent is a challenging 50k trail race set in the stunning Colorado mountains, taking place on September 28, 2025. Starting and finishing at the base of Mount Princeton, participants will experience a significant elevation gain of 7,000 feet, reaching a high point of 13,150 feet. The cou..

Rocky's Backyard Ultra is an exciting ultra trail running event held in Estes Park, Colorado, at the YMCA of the Rockies. This unique race format requires participants to complete a 4.167-mile loop every hour until only one runner remains. The course features stunning Rocky Mountain scenery, with ap..

The Castle Rock Trail Festival is an exciting athletic event that caters to a wide range of participants, from ultra-distance runners to families with children aged 5 to 12. Set against the stunning backdrop of Philip S. Miller Park and Ridgeline Open Space, the festival features various race option..