Trail Running Calendar Colorado 2026-2027

The Freakin Freezin 5K - Denver will take place in Civic Center on Sunday 25 January 2026. You can run 5 kilometers.

Join the Know The Snow Rando Race on January 25, 2026 at Purgatory Mountain Resort in Durango, Colorado to support avalanche education in the San Juan Mountains. Pick a 9.5 mile or 5.5 mile course and dress up for prizes.

The Sourdough Snowshoe Race in Nederland, CO is a donation based backcountry event offering 18K and 30K routes where snowshoes are required. Enjoy rugged alpine scenery with a warming tent and hot drinks at the finish.

An 8K T&H race on February 1, 2026 at Edora Park in Fort Collins for Fort Collins Running Club members only; a bib is required and volunteers are welcome.

Join the Super Sunday 5K on February 8, 2026 in Littleton for a scenic run along the Mary Carter Greenway. Celebrate at a post race party at Breckenridge Brewery Farmhouse with 20% off food and drinks and community fun.

A two-person partner race on Virginia Canyon road in Idaho Springs, CO, held on Valentine’s Day. Runners each complete a roughly 12-mile out-and-back; team time is the sum of both individual times and multiple awards are offered.

Join the Gothic Mountain Tour in Crested Butte, a fundraising Nordic ski with competitive 23.5 miles and recreational 17.85 miles options. Limited to 200 skiers, enjoy alpine scenery and a festive finish at Magic Meadows Yurt.

Stories Trail Runs at Cheyenne Mountain State Park offer scenic, challenging multi loop trail races and timed ultras on Feb 21 and 22, 2026. Choose distance races or 6 hour and 15 hour timed options in a small field for rugged Colorado trai..

A freestyle cross-country ski race at Durango Nordic Ski Club with big climbs, mountain views, and groomed snow. Multiple distances are offered and the event serves as the grand finale of the Salomon Southwest Nordic Race Series.

Join Uncle Clyde's Run & Slide at Purgatory Resort in Durango on Feb 28 for a fun team relay where pairs sprint up the tubing hill, slide down and tag off for 60 or 90 minute races. Costumes, cold weather gear and big laughs encouraged.

Trail marathon, half marathon and 2 mile run in Salida, CO on March 14, 2026. Courses use dirt roads and narrow single track at elevations from 7000 to 9000 feet, with awards, race socks, and a 500 person combined cap.

Race The Ranch is a snowshoe race at Snow Mountain Ranch near Granby, Colorado on April 4, 2026, offering 5k, 25k and 50k looped courses over scenic groomed and singletrack snow trails. Finishers receive a custom beanie and engraved Miir ca..

A three-day trail running festival in Fruita, Colorado with four distances on desert singletrack and slickrock. The 100K serves as a Western States qualifier and select races award UTMB Index Running Stones.

Join Run the Ranch April 10 and 11, 2026 at Sylvan Dale Guest Ranch in Loveland, Colorado for trail races on private ranch trails, from 5K and 10K to timed 4 hour, 6 hour and 12 hour solo and relay events. Virtual options available.

Mountain Ridge Trail Race on Saturday April 11 2026 in Highlands Ranch Colorado starts and finishes at Mountain Ridge Middle School. Choose 21 mile, half marathon, 10 km or 5 km on mostly dirt single track with rolling climbs.

Take on the scenic Poudre River Trail April 11 and 12 2026 in Northern Colorado with 50 and 100 mile solo and relay options. Stocked aid stations, finisher swag, belt buckles for solos and a lively post race party await.

Join the Rattler Trail Race in Palmer Park, Colorado Springs, where singletrack trails wind through sandstone bluffs and offer panoramic views of the city and Pikes Peak. Choose from 50K, 25K, 10K or 5K on technical but runnable terrain.

Celebrate Earth Day in Durango with a scenic 5K along the Animas River Trail starting and finishing at Rotary Park. This zero waste run supports Compañeros and pairs perfectly with the town's Earth Day parade and festival.

Experience cliffside trail running along the Royal Gorge rim on April 25, 2026 in Cañon City, Colorado, with rocky technical trails and epic views over the Arkansas River. Distances from a fun 5K to a tough 50K suit all trail runners.

On May 2, 2026 Greenland Trail Races in Larkspur, Colorado offer 4 Mile, 8 Mile, 25K and 50K trail options on dirt trails with aid stations, chip timing, a virtual option, and awards by overall and age group.