Trail Running calendar near Denver 2025-2026

Take on scenic, high elevation singletrack at Staunton State Park with choices of 50K, 16 mile, or 8 mile courses. Limited field, well stocked aid stations, and a finisher shirt and medal make this mountain trail race a memorable challenge.

Take on the Thumbs Up Vertical Challenge in Estes Park for a grueling loop of steep single track and big views as you race to collect poker chips each lap. Limited to 30 runners, unique ascent patches reward milestone climbs and a special p..

Join collegiate and junior skiers for the USCSA Cross Country Ski Racing Festival in Granby, Colorado at Snow Mountain Ranch. Two days of classic and skate racing promise fast snow, college points and gear giveaways in a lively community at..

Join the Freakin Freezin 5K in Denver on January 25 for a chilly, car free, flat trail run at Northfield High School with medals for all finishers. Choose a 5K, a no shirt option, or run virtually and score a finisher package.

Tackle the Sourdough Snowshoe Race in Nederland CO on Jan 31 2026, a donation based backcountry challenge where snowshoes are required for the full route. Choose 18K or 30K and warm up at the finish with hot drinks and a warming tent.

Join the Super Sunday 5K on February 8, 2026 for a fun run or walk along the Mary Carter Greenway. Celebrate afterward at Breckenridge Brewery Farmhouse with event swag and 20% off food and drinks.

Run scenic singletrack at Cheyenne Mountain State Park during the Stories Trail Runs on Feb 21 and 22, 2026. Timed six and 15 hour challenges plus 10k, half marathon and 20 mile options offer something for every trail runner.

Race The Ranch in Granby, Colorado invites snowshoers to tackle scenic looped courses at Snow Mountain Ranch across 5k, 25k, and 50k distances. Finishers earn a custom beanie and engraved camp mug in this supported winter adventure.

Run the Ranch is a weekend trail festival at Sylvan Dale Guest Ranch in Loveland, CO, featuring 5K, 10K and timed 4, 6 and 12 hour events plus relays and virtual options. Enjoy varied ranch terrain, on course support, meal tickets for entra..

Run the Poudre River Trail April 11 and 12 2026 at the NoCo Urban Ultra and Relay, with 50 and 100 mile solo or relay options. Enjoy a scenic route through Fort Collins, Timnath, Windsor and Greeley and celebrate at a lively finish festival..

Run scenic singletrack at the Rattler Trail Race in Palmer Park, Colorado Springs, with options from 5K to 50K that pass sandstone bluffs and offer Pikes Peak views. Technical but rewarding trails suit a range of abilities.

Hit the scenic Great Western Trail in Severance on April 18, 2026 with 5K, 10K, half marathon and kids fun run options for every level. Enjoy chip timing, finisher shirt and medal, plus post race food and beer while supporting local nonprof..

Mountain Ridge on April 18, 2026 in Highlands Ranch CO features 21 mile, half marathon, 10K and 5K on scenic dirt trails and bike paths. Courses offer rewarding climbs and aid stations; cupless event so bring or buy a reusable cup.

Run scenic double track with Front Range views at the Greenland Trail Races in Larkspur, Colorado, offering 4 Mile to the RRCA National 50K Championship. Finishers receive a tech shirt, medal and a 50K belt buckle.

Niwot's Challenge is a by invitation only endurance event near Sedalia, Colorado that prizes off trail navigation and self reliance over racing. Limited to 40 entrants, it offers routes up to 100 miles for experienced wilderness runners.

Take 5 in the Garden invites runners to explore Garden of the Gods in Colorado Springs with road and trail distances. Enjoy traffic free courses past red rock formations and views of snow capped Pikes Peak.

Join the Valkyrie Trail Race on May 9, 2026 at Cheyenne Mountain State Park for a women focused day of stunning singletrack, rocky descents and springtime views. Distances from short runs up to 50K ultramarathon welcome all levels.

The Quad Rock 50 will take place in Fort Collins on Saturday 9 May 2026. You can run between 25 and 50 miles.

Choose from 15K to 55 mile routes and explore scenic single track and forest roads around Rampart Reservoir, starting at Buffalo Lodge Bicycle Resort. Expect high alpine views near 9,500 feet, aid stations and a finisher award.

Run the North Fork 50 Mile or 50K on May 30, 2026 in Buffalo Creek, Colorado, through ponderosa pine and granite views on all soft singletrack. Celebrate at a finish festival while supporting the North Fork Volunteer Fire Department.