Trail Running Calendar Colorado 2025-2026

Hit the trails at Louisville Community Park for the 12th annual Louisville Trail Race, with 5K, 10K and half marathon options on scenic dirt trails. Enjoy live split tracking, post race festivities and a cupless sustainability focus.

Experience crisp late season trails at the Colorado Cold Rush Ultra in Colorado Springs, with 50K, half marathon and 10K routes that climb historic High Drive and Gold Camp Road. Expect big climbs, stocked aid stations and standout finisher..

Test yourself on high elevation winter trails at Staunton State Park with 50k, 16 mile, and 8 mile distances. Limited to 250 runners, this December race offers hearty aid stations and a unique finisher award for all finishers.

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..

Take on the Summit for Life in Aspen on December 6, 2025 with options to race uphill, ride the scenic gondola, or join virtually. Celebrate afterward at the Sundeck with food, live music and awards.

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..

Run the Rio Frio 5k on the frozen Rio Grande in Alamosa, CO, with San Juan and Sangre de Cristo views and chip timing. Embrace the icy course with traction footwear and chase ice themed awards in this one of a kind winter race.

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.

Circle Gothic Mountain in this scenic nordic ski tour in Crested Butte with two course options and a festive finish at Magic Meadows Yurt. Proceeds benefit Crested Butte Nordic.

Run winter trails at Cheyenne Mountain State Park across a two day weekend with timed 6 hour and 15 hour ultras plus 10k, half marathon and 20 mile options. Start and finish at Swift Puma Campground amid rugged climbs and variable February..

Experience the Pine Needle Langlauf at Durango Nordic Center on Feb 21, 2026, with scenic climbs, fast descents and great snow. Celebrate the Southwest Nordic series finale with live music, a deck party, prizes, schwag and the crowning of t..

Join the 21st Run Through Time in Salida, Colorado on March 14, 2026 for scenic high elevation trail races: marathon, half, and 2 mile. All registered runners get custom socks and proceeds benefit local trails and search and rescue.

Race The Ranch at Snow Mountain Ranch in Granby Colorado on April 4, 2026 is a scenic snowshoe race with distances up to 50k on singletrack and groomed trails. Tackle challenging loops, enjoy on course aid, and earn a custom finisher mug.

The Desert Rats Trail Running Festival will take place in Fruita from Friday 10 April 2026 to Sunday 12 April 2026. You can run between 9 and 100 kilometers.

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..

Mountain Ridge Trail Race in Highlands Ranch, Colorado on April 18, 2026 offers 5K to 21 mile routes on scenic dirt single track and bike path. Enjoy challenging climbs, friendly finish vibes and a spring trail experience for all levels.

Run the rim of the spectacular Royal Gorge in Cañon City with distances from a 5K to a 50K and a kid's mile for the whole family. Expect rugged trails, high canyon views, aid stations, and live race tracking for a spring adventure.

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.