Trail Running calendar near Frederick 2025-2026

Run scenic single track trails near the Denver skyline at the Great Trailhead Foot Race in Bear Creek Lake Park on October 18, 2025. Choose 5 or 10 miles, get a tech tee and post run party, and 10 mile finishers earn a mug.

Run the Blue Sky Trail Marathon or half marathon in Fort Collins on Oct 18 and 19, 2025, over scenic singletrack between Horsetooth Mountain Park and Devils Backbone. Finish with food, awards and sweeping mountain views.

Discover seldom run single track at Indian Creek Campground in Sedalia Colorado on October 18 2025 with 50 Mile, 55k, 15 Mile and 5 Mile options. Enjoy sweeping Front Range views, aid stations, a race shirt and finisher medal.

Tackle scenic dirt trails at Bear Creek Lake Park with 5 km, 15 km, a 5 plus 15 double, or a kids 1 km. Registration includes socks or a neck gaiter and a pancake breakfast while kids earn a stuffed bear at the finish.

The Colleen De Reuck XC Classic is a cross country running event held annually at Harlow Platts Community Park in Boulder, Colorado. Honoring renowned distance runner Colleen De Reuck, the race promotes health, fitness, and celebrates local..

Colorado 24 Hour Run takes place in Fort Collins, Colorado, at 4927 E. County Road 36. The event offers multiple distance options: 24-hour, 12-hour, and 6-hour races, plus 24-hour, 12-hour, and 6-hour relays.Runners complete laps on a one-m..

The HRCA Backcountry Wilderness Half Marathon is an annual 13.1-mile trail race held in Highlands Ranch, Colorado, featuring a scenic single-loop course through the Douglas County East/West trail and the Backcountry Wilderness Area. The rac..

BINGO! Trail Party : basic info The BINGO! Trail Party takes place on Saturday, November 8, 2025, at May Farms in Byers, CO. The event has a combined runner capacity of 300 and is organized as multiple levels with different distance ranges:..

Run the Louisville Trail Race on November 15, 2025, amid the Flat Irons with 13.1, 10K or 5K dirt courses on scenic trails. Enjoy post race festivities and bring a reusable cup or purchase one onsite.

Run scenic high country trails at Staunton State Park on Dec 6 with 50K, 16 mile and 8 mile options, plus well stocked aid stations and sweeping mountain views. Park pass is required and limited parking means most use a park and ride shuttl..

Take on the Thumbs Up Vertical Challenge in Estes Park CO on December 6, 2025, a small field test of grit with steep single track laps and sweeping views of Longs Peak and Mount Meeker. With only 30 spots, this intimate winter climb rewards..

USCSA Cross Country Ski Racing Festival, hosted by Colorado Mesa University at Snow Mountain Ranch Nordic Center in Granby, Colorado, on January 24–25, 2026, brings collegiate teams together with junior skiers for a two-day Nordic festival...

The Sourdough Snowshoe Race will take place in Nederland on Saturday 31 January 2026. You can run between 18 and 30 kilometers.

Race The Ranch invites snowshoers to YMCA Snow Mountain Ranch in Granby Colorado on April 4 2026 for multiple distances on scenic trails and lesser known loops. Expect challenging climbs, friendly aid stations and great finisher swag.

Run the Ranch is an annual trail running event held at the scenic Sylvan Dale Guest Ranch in Loveland, Colorado. The race offers a variety of distances including 5K, 10K, and timed trail runs of 4, 6, and 12 hours, with options for solo run..

The Great Western Trail Race, held in Severance, Colorado, offers a variety of running events including a 5K, 10K, half marathon, and a Kids Fun Run. Scheduled for April 18, 2026, this race welcomes participants to enjoy spring racing in a..

Niwot’s Challenge is an invitation only, navigation driven ultra near Sedalia CO that emphasizes self reliance on rugged off trail terrain. Choose roughly 24, 50, or 100 mile routes with massive elevation gain and strict no GPS rules for a..

Run scenic dirt trails in Greenland Open Space near Pikes Peak with 50K, 25K, 8 Mile and 4 Mile options, highlighted by the 2026 RRCA National 50K Championship. Expect sweeping views, solid race swag and a lively trail day atmosphere.

The Weld Your Mettle Running Festival, held in Eaton, Colorado, is a multi-day event featuring a variety of running challenges for all levels. Participants can choose from solo or relay races lasting 3, 6, 9, 12, 24, or 36 hours, including..

North Fork 50 : Event details The North Fork 50 Mile/50K is scheduled for Saturday, May 30, 2026, in Buffalo Creek, Colorado. The start and finish are at the Buffalo Creek Clubhouse, 18050 S Buffalo Creek Rd, Buffalo Creek, CO 80470. Distan..