Trail Running calendar near Aurora 2025-2026

Tackle winter trails at Staunton State Park in December with 50k, 16 mile, or 8 mile options through high meadows and granite cliffs. Enjoy alpine views, stocked aid stations, shuttle access, and a unique finisher medal.

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.

Winter trail races at Cheyenne Mountain State Park on Feb 21 and 22, 2026. Multiple timed distances and scenic views of Cheyenne Mountain and Pike's Peak. Expect snow and mud, plus camping and a small friendly field.

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 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..

Challenge yourself on scenic dirt singletrack and bike path near Highlands Ranch at Mountain Ridge Trail Race. Choose from 21 mile, half marathon, 10K or 5K routes that climb foothill terrain with aid stations and a school start and finish.

Run scenic dirt trails with views of Pikes Peak at the Greenland Trail Races on May 2, 2026, featuring 50K, 25K, 8 mile and 4 mile options. All finishers get a technical shirt and medal and 50K finishers earn a commemorative buckle.

Niwot's Challenge in Sedalia on May 2, 2026 is invitation and acceptance only, not a race, testing rugged off trail navigation and self sufficiency across punishing loops with massive elevation gain. Traditional entries rely on map and comp..

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.

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.

Take on the North Fork 50 Mile or 50K trail ultramarathon on scenic singletrack in Buffalo Creek, Colorado, with mountain views and ponderosa forest. Celebrate at a lively post race festival and support the North Fork Volunteer Fire Departm..

Experience alpine single track, meadows and aspen groves at Granby Ranch on June 6, 2026, with options from a 50k, marathon and half to a 6 mile or the looped Elevation Challenge. Expect big climbs, stunning views, aid stations and a spirit..

The Great Divide Ultra in Mueller State Park, Divide Colorado on June 6 and 7, 2026 offers 25k to 100 mile courses and a Saturday night trail run at sunset. Enjoy rolling meadows, granite views and a true mountain ultra festival atmosphere.

Join Aiden's Adventure 5k at Fountain Creek Regional Park for a relaxed, family friendly trail fun run with a virtual option and a kids mile. Enjoy crafts, a butterfly release, food trucks and community vibes while supporting local charitie..