Trail Running Calendar Colorado 2026-2027

Join the USCSA Cross Country Ski Racing Festival at Snow Mountain Ranch in Granby Colorado on Jan 24 and 25 2026. Collegiate teams and middle and high school racers take on classic distances and a skate sprint over two action packed days.

Run across the frozen Rio Grande at the Rio Frio 5k on Ice in Alamosa Colorado with chip timing, ice themed awards and mountain views. Bring traction friendly shoes for a snowy, scenic challenge.

Brave the cold at the Freakin Freezin 5K in Denver on Jan 25 at Northfield High School. Run a flat, car free trail 5K or go virtual, earn a custom finisher medal, and get guaranteed swag if you register by Jan 15.

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.

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.

Join Pine Needle Langlauf, a freestyle cross country ski race at Durango Nordic Ski Club with scenic climbs, descents and mountain views. Choose 30K, 15K, 7.5K or 3K and enjoy live music, schwag and an awards ceremony as the series finale.

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..

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.

Join the 21st Run Through Time Trail Marathon and Half Marathon in Salida Colorado on March 14 2026 for scenic high country trails and Arkansas Valley views. Limited fields and varied distances make this a memorable spring trail challenge.

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..

Run desert singletrack and slickrock mesas above the Colorado River at Desert RATS Trail Running Festival by UTMB in Fruita CO. This three day festival features races 9K to 100K, a basecamp party, kids race, and UTMB qualification chances.

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.

Run the Greenland Trail Races in Larkspur, Colorado on May 2, 2026 with 50K, 25K, 8 Mile and 4 Mile options and the 2026 RRCA National 50K Championship. Scenic dirt trails wind through ponds, oak hills and offer Pikes Peak views.