Trail Running calendar near Weld County 2025-2026

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.

Take on a scenic backcountry snowshoe race near Nederland, Colorado with 18K and 30K routes along the Sourdough Trail. Donation based event requires snowshoes and offers aid at Brainard Lake plus a warming tent and hot drinks at the finish.

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.

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..

Take on scenic singletrack loops near Fort Collins, Colorado, with 25 miles or 50 miles of rugged high country and big vertical gain. Expect technical trails, sweeping views and occasional wildlife encounters.

Hit the scenic Devil's Backbone trails for the Crazy Legs 10k+ Trail Run on June 7, 2026, a looped course with rugged singletrack and friendly aid. Expect classic small race vibes, volunteer support, and stunning Colorado views.

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.

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.

Join the Wild West Relay, a scenic point to point run of roughly 200 miles from Fort Collins to Steamboat Springs. Solo runners and teams of all sizes are welcome for an unforgettable overnight relay adventure.

Run the Lory Summer Trail Series in August at Lory State Park: four midweek trail races from 5K to 12K with scenic climbs and friendly competition. Stay after each race for pizza, drinks and a free vintage shirt, plus series awards.

Run the Lory Summer Trail Series in August at Lory State Park: four midweek trail races from 5K to 12K with scenic climbs and friendly competition. Stay after each race for pizza, drinks and a free vintage shirt, plus series awards.

The Lory Summer Trail Series will take place in Bellvue on Tuesday 25 August 2026. You can run 12 kilometers.

Ned Ned Run in Nederland Colorado blends scenic trail and road running through the foothills, offering a half marathon, 10K and fun 5K for all abilities. Family friendly and costumes encouraged, with leashed dogs welcome in the 5K.

Take on the Black Squirrel Half Marathon at Lory State Park near Bellvue, Colorado, a 13.5 mile trail challenge with about 2,000 feet of climbing across scenic singletrack. Limited to 400 runners, the day also offers a free 1 mile kids race..

Red Feather Trail Jamboree in Red Feather Lakes Colorado offers a weekend of scenic singletrack racing, camping and a community dinner at Ben Delatour Scout Ranch. Choose 50 Mile, 50K or Half Marathon, capped at 500 runners.

The Bear Chase is a two day trail running festival at Bear Creek Lake Park on October 3 and 4, 2026. From ultras to fun 5K and 10K options, enjoy scenic single track loops with aid stations and live split tracking.

Run scenic dirt trails and wide mountain views at the HRCA Wildcat Mountain Trail Races in Littleton, CO. Choose a 10 mile, 10K, or kids fun run and enjoy post race pancakes, medals, and a festive mountain day.

Take on the Blue Sky Trail Marathon or Half around the hogbacks near Fort Collins, Colorado on scenic singletrack with rocky ridgelines and big views. Limited fields and stocked aid stations make for a focused trail race.