Trail Running calendar near Castle Rock 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.

Run scenic, varied loops at Cheyenne Mountain State Park with 10K, half marathon, 20 mile and 6 hour and 15 hour timed options plus two day passes and camping. Expect rugged mountain trails, stocked aid stations and finisher medals.

Race The Ranch is a scenic snowshoe race at Snow Mountain Ranch in Granby Colorado on April 4 2026, with 50k, 25k and 5k loop options over snowy singletrack and groomed trails. Finishers receive a custom bib, Fractel beanie and engraved Mii..

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 Palmer Park's singletrack at the Rattler Trail Race on April 18, 2026, with 50K, 25K, 10K and 5K options. Enjoy technical trails, sandstone bluffs and sweeping views of Colorado Springs and distant Pikes Peak on a low elevation gain cou..

Run the rim at Royal Gorge Groove in Cañon City, Colorado, with distances from a 5K to a rugged 50K. Enjoy technical trails, sweeping Arkansas River views, live chip timing, and an energetic resort atmosphere.

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.

Run among iconic red rock formations with sweeping views of Pikes Peak at Take 5 in the Garden on May 2, 2026 in Garden of the Gods, Colorado Springs. Road and trail races range from a 5K to 9.5 miles and the park will be closed to vehicles..

Take on the Collegiate Peaks Trail Run in Buena Vista Colorado with 25 or 50 mile options through stunning high country. Mark the 36th anniversary with a memorable mountain trail challenge.

Valkyrie Trail Race is a women focused spring trail festival at Cheyenne Mountain State Park near southern Colorado Springs, with multiple distances from 4 miles to 50K. Expect climbs, singletrack and technical rocky descents for a scenic,..

Ram Party Trail Runs brings scenic mountain trails around Rampart Reservoir to Buffalo Lodge in Colorado Springs, with distances from 15K to 55 mile for every kind of runner. Expect high country climbs, aid stations, and finisher awards.

Join the Spirit Trail Race in Buena Vista on May 24, 2026 for marathon, half marathon or 9K during Memorial Day weekend and CKS Paddlefest. Scenic start at South Main Town Square and proceeds support local conservation and community groups.

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.