Trail Running calendar near Nederland 2025-2026

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.

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.

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.

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.

Experience Colorado single track trails at Mountain Ridge Trail Race on Saturday April 11 2026 in Highlands Ranch, with distances from 5K to 21 Mile and live tracking. Scenic dirt paths and climbs offer a rugged, cupless trail challenge.

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..

May 2, 2026: Greenland Trail Races at Greenland Open Space in Larkspur offer distances from 4 miles to 50K plus a virtual option. Scenic dirt trails with Pikes Peak views, aid stations, tech shirts, medals, and a 50K 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.

Tackle the Quad Rock 25 or 50 mile trail races on May 9, 2026 in scenic Lory State Park and Horsetooth Mountain Park near Fort Collins. Expect rugged singletrack, big climbs and sweeping views for a challenging, unforgettable day on the tra..

Run the North Fork 50 Mile or 50K on scenic singletrack around Buffalo Creek, Colorado. Choose your distance, enjoy aid stations and a festive finish, and support the North Fork Volunteer Fire Department.

Run the Summits Trail Runs on June 6, 2026 at Granby Ranch Resort, Colorado, with options from a 6 mile to a challenging 50k. Experience single track trails, alpine meadows, and big climbs in a limited field for an intimate mountain race.

Explore high alpine loops at Mueller State Park on June 6 and 7 for the Great Divide Ultra, with distances from 25k to 100 mile and night run options for 25k and 50k. Scenic views, supportive aid, and standout finish swag await.

Take on the Crazy Legs 10k trail run through the scenic Devil's Backbone Open Space in Loveland on June 7, 2026. Limited spots, marked trails, and a post race celebration at Loveland Aleworks make this a fun mountain running day.

Run the scenic Barr Lake Trail Race at Barr Lake State Park in Brighton, CO on June 13, 2026. Choose from 5K to 50K on a looped dirt course with continuous lake and Front Range views, friendly aid stations, and a relaxed mostly flat route.

The Race in the Clouds - Alma Dirt Festival will take place in Alma from Thursday 25 June 2026 to Sunday 28 June 2026. You can run between 6 and 13 miles.

Hit the foothill dirt trails at Lory State Park on June 27 for the Timberview Trail Run with 10 mile, 5 mile and beginner friendly 5K options. Finish with pancakes, craft beer and finisher swag at this USATF sanctioned community favorite.

Run the Life Time Leadville Trail Marathon or Heavy Half on June 27, 2026, tackling high alpine singletrack and dirt roads through historic mining country up to Mosquito Pass at 13,185 feet. Expect a challenging, possibly snowy race with fu..

Tackle high alpine trails above 10,000 ft at the Silverheels Trail Runs in Como, Colorado, July 10 to 11, 2026. Choose distances from the 100 Mile ultra to shorter options and run single track, fire roads and scenic historic mining country.