Trail Running calendar near Granby 2025-2026

The Emerald Mountain Epic is a two-day endurance trail race held in Steamboat Springs, featuring mountain biking and trail running events. Participants navigate challenging courses with significant elevation gains, predominantly on single-track dirt trails. The event emphasizes community, camaraderi..

The Lory Summer Trail Series, taking place from August 5 to August 26, 2025, offers a series of midweek trail races designed for both novice and experienced runners. Participants can choose from distances ranging from 5K to 12K, with courses that vary in elevation and difficulty. The event aims to c..

The Eltuck Valley 5K is part of a series of midweek trail races held at Lory State Park in Bellvue, Colorado. Scheduled for August 5, 2025, this event is designed to cater to both novice and experienced runners, offering a flat and fast course ideal for those looking to improve their speed. Particip..

The Run The Rockies Trail Race offers a scenic running experience through the Frisco Peninsula trails, featuring a 5k, 10k, and half marathon. Participants can enjoy stunning views of Dillon Reservoir and the Ten Mile Range, making it an ideal course for both beginners and seasoned runners. The even..

The Holy COW Trail Stampede is an exciting running event held in Westminster, Colorado, featuring a 10-mile race and 5K/10K options. Participants can enjoy a fun and festive atmosphere while supporting the charity partner, Growing Home, which focuses on breaking the cycle of poverty for families in..

Dirt Circus - Boulder is a vibrant community running event scheduled for August 9, 2025, in Boulder, Colorado. Organized by UltraSignup, this festival celebrates local races, run clubs, and businesses, fostering camaraderie among trail running enthusiasts. Participants can enjoy a social run with op..

The Into the Hills Eltuck 10K is part of a series of midweek trail races held at Lory State Park in Bellvue, Colorado. Scheduled for August 12, 2025, this event is designed to cater to both novice and experienced trail runners, offering a challenging course with significant elevation gain and stunni..

The Leadville Trail 100 Mile Run, known as the "Race Across the Sky," is a prestigious ultramarathon held annually in Leadville, Colorado. Established in 1983, this grueling race challenges participants with a 100-mile out-and-back course that features extreme elevation changes, including a peak at..

The Into the Hills Eltuck 5K is part of a series of midweek trail races held at Lory State Park in Bellvue, Colorado. Scheduled for August 19, 2025, this event features a challenging course with a steep climb and descent, making it suitable for both novice and experienced trail runners. Participants..

The Arrowhead Half Marathon and 5K is a scenic running event held in Arrowhead, Colorado, featuring a challenging half marathon course with approximately 3,000 feet of elevation gain over 13 miles. Participants traverse beautiful trails across Arrowhead, Bachelor Gulch, and Beaver Creek Ski Resorts...

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, catering to athletes of all levels. The courses primarily traverse dirt..

The Staunton Rocks! Marathon and Half Marathon, scheduled for August 23, 2025, takes place in the scenic Staunton State Park, located in Colorado's Front Range Mountains. This event features a challenging yet accessible course, primarily on singletrack trails, allowing participants to enjoy breathta..

The Westminster Night Trail is an exciting 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 surrounding mounta..

The Continental Divide Trail Run, scheduled for August 23, 2025, in Steamboat Springs, Colorado, features three trail race options: a 5-mile, a 16-mile, and a 50K. Participants will experience stunning views while navigating through aspen and pine forests, with significant elevation gains—over 3,500..

The Eltuck Valley 12K is part of the Lory Summer Trail Series, taking place at Lory State Park in Bellvue, Colorado. This event features a series of midweek trail races designed for both novice and experienced runners, offering distances from 5K to 12K. The series aims to provide a fun and low-key a..

The Front Range Ultra Dayze is an exciting ultra-running festival taking place in Loveland, Colorado, featuring 100 hours of continuous running. This event invites participants from across the U.S. to engage in various ultra-distance races, including options for 200-mile, 100-mile, and timed events..

The 10k @ 10,000 Feet is a renowned trail running event held in Steamboat Springs, Colorado, celebrated for its stunning mountain scenery. This challenging race features a 10k course, which is actually 6.8 miles, and a 5k option, both starting at the summit of Rabbit Ears Pass. Participants navigate..

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, all set on a scenic 1.0..

The Black Squirrel Half Marathon, scheduled for September 6, 2025, takes place in Lory State Park, Bellvue, Colorado. This challenging 13.5-mile trail race features a mix of technical and non-technical terrain, with approximately 2,000 feet of elevation gain. Runners will enjoy stunning views of Hor..

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 climbing mor..