Trail Running calendar near Westminster 2024-2025

The North Fork 50 Mile/50K is an ultramarathon set in the scenic Colorado mountains near Denver. This event features a challenging course that is entirely on soft surfaces, primarily consisting of singletrack trails, with some sections of double track road. Runners will experience diverse landscapes..

The Crazy Legs 10k+ Trail Run is an exciting running event taking place at Devil’s Backbone Open Space in Loveland, Colorado, on June 1, 2025. This trail run features a challenging course designed to provide a fun experience for participants. Runners will navigate through various trails, with water ..

The Great Divide Ultra is a premier trail running event held in Divide, Colorado, featuring a variety of race distances including 100 miles, 100K, 50K, and 25K, taking place on June 7-8, 2025. Set in the scenic Mueller State Park, participants will experience beautiful rolling meadows and stunning v..

Estes Park's Backyard Ultra is a unique ultra-running event set against the stunning backdrop of Lake Estes, Colorado. Participants must complete a distance of 4.252 miles within one hour, every hour, until only one runner remains. This format continues indefinitely, with the last runner standing be..

The Leadville Trail Marathon and Heavy Half is a challenging running event that takes participants through the historic mining district of Leadville, Colorado. The marathon covers 26.4 miles, while the Heavy Half spans 15.4 miles, both reaching high altitudes, with the marathon topping out at Mosqui..

The Timberview Trail Run is an exciting annual event held at Lory State Park in Colorado, featuring three race distances: a 10-mile, a 5-mile, and a 5K trail run. Scheduled for June 28, 2025, this event welcomes participants of all ages and skill levels, offering a scenic course with stunning views ..

The Alma Foundation Race in the Clouds Dirt Festival is an exciting outdoor event taking place in Alma, Colorado, from July 10 to July 13, 2025. Set at an elevation of 10,600 feet, the festival features a variety of activities including mountain bike racing, trail running, a free kids' bike race, an..

Chase the Moon is an exciting overnight running event held in the Highlands Ranch Backcountry trail system, featuring a 12-hour solo ultramarathon and team relays. Participants can choose to run solo or form teams of 3 or 5. New this year, shorter distances such as 5 miles, 10 miles, 25K, and 50K ar..

The Silverheels Trail Runs, part of the Human Potential Running Series, will take place on July 11-12, 2025, in Como, Colorado. This annual event features multiple race distances, including a 100-Mile, 100k, 50-Mile, 60k, 19-Mile, and 10-Mile, catering to a variety of runners. The courses, set at an..

The Leadville Silver Rush 50M is a challenging 50-mile trail run set against the stunning backdrop of the Rocky Mountains. Participants will navigate a course featuring significant elevation gain, technical climbs, and breathtaking views, making it a true test of endurance and skill. The event serve..

The Pikes Peak Ultra is an exciting running event designed to highlight the stunning trails of Colorado Springs. Established in 2015, the race begins at Bear Creek Regional Park and features courses of varying distances: 20K, 30K, 50K, and 50 miles. Participants will traverse scenic routes, includin..

The Summit 200 is an extraordinary 200-mile mountain race set in Summit County, Colorado, featuring a challenging loop that showcases stunning hiking trails, forest roads, and scenic views. Runners will experience significant elevation changes, with the lowest point above 9,000 feet and sections rea..

The Sheep Mountain Ultras, part of the Human Potential Running Series, is an annual trail running event held in Fairplay, Colorado. Scheduled for August 2, 2025, it features three race distances: a challenging 50-mile, a 50k, and a half marathon, all set against the stunning backdrop of the South Pa..

The Lory Summer Trail Series, scheduled for August 2025, features a series of midweek trail races at Lory State Park in Fort Collins, Colorado. Participants can choose from distances of 5K, 10K, and 12K, designed to cater to both novice and experienced trail runners. The event aims to create a fun a..

The Holy COW Trail Stampede is an exciting running event held in Westminster, Colorado, featuring a 10-mile race and a 5k/10k option. 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..

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 event challenges participants with a 100-mile out-and-back course that features extreme elevation changes, including a peak at..

The Front Range Ultra Dayze will take place in Loveland from Thursday 28 August 2025 to Monday 1 September 2025.

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 diverse terrain, includ..

The Red Feather Trail Jamboree is a three-day trail running event held in September 2025 at the Ben Delatour Scout Ranch in Red Feather Lakes, Colorado. Participants can choose from three race distances: 50 miles, 50K, and a half marathon, each featuring scenic trails with varying elevations and ter..

The Pikes Peak Ascent and Marathon is a renowned running event held annually in Manitou Springs, Colorado. Established in 1956, the Pikes Peak Marathon is the oldest continuously held marathon in the United States, featuring a challenging course that ascends to the summit of Pikes Peak at 14,115 fee..