Trail Running calendar near Loveland 2025-2026

Run The Ranch is an exciting trail running event taking place from April 1 to April 5, 2025, in Loveland, Colorado, at the Sylvan Dale Guest Ranch. Participants can choose from various distances, including a 5K, 10K, and multiple timed trail runs ranging from 4 to 12 hours, with options for solo and..

The Can't Be Mad Running Festival, taking place in Erie, CO, offers a variety of running events including a 10K, 5K, a 3-hour timed event, and a Kid's 1K, with both in-person and virtual options available. The course features a flat and fast off-road cross-country style route with scenic views of th..

The Great Western Trail Race, taking place in Severance, Colorado, features a variety of running events including a 5K, 10K, half marathon, and a Kids Fun Run. This event celebrates Northern Colorado's newest trail, connecting Windsor, Severance, and Eaton. Participants can enjoy a festive atmospher..

The Rock Hawk Trail Races, part of the Bear Chase Race Series, will take place on April 19, 2025, at Phillip S. Miller Park in Castle Rock, Colorado. This event features multiple race distances, including 50K, 25K, 10K, and 5K, catering to both novice and experienced trail runners. The scenic trails..

Niwot's Challenge is a challenging ultramarathon held in Colorado's Front Range, designed for experienced runners. Modeled after the Barkley Marathons, this grassroots event features a secretive course that requires participants to navigate primarily off-trail using a map and compass. The event incl..

The Mountain Ridge Trail Race, taking place on May 10, 2025, in Highlands Ranch, Colorado, offers a variety of distances for trail running enthusiasts, including a 21-mile, half marathon, 10K, and 5K. Celebrating its 11th year, the race features scenic dirt and single-track trails with manageable el..

The Quad Rock 50 and 25 Mile Trail Races, organized by Gnar Runners, will take place on May 10, 2025, in Lory State Park and Horsetooth Mountain Park, near Fort Collins, Colorado. This challenging event features a scenic course with significant elevation gains—over 5,500 feet for the 25-mile race an..

Samson's Revenge is a trail running event held at the YMCA of the Rockies in Estes Park, Colorado, honoring the legacy of Samson, a famous elk poached in 1995. The race features three distances: 10K, 27K, and 55K, with a challenging course that includes a significant ascent known as the King of the..

The Weld Your Mettle Running Festival is a four-day event taking place in Eaton, Colorado, from May 23 to May 26, 2025. It offers a variety of running challenges suitable for all levels, including a 7K run, ruck, and timed events ranging from 3 to 48 hours, either solo or as part of a relay team. Pa..

The Ol' College Try 24 Hour Ultra is Denver's inaugural 24-hour ultra race, organized by Rise Again Running Events in collaboration with Tall Tales Ranch. Scheduled for May 24-25, 2025, at Auraria Campus, this event invites runners of all abilities to challenge themselves and achieve personal bests..

The Pilot Hill 25K is Wyoming's oldest continuously run footrace, originating in the 1970s. This classic trail race features rugged terrain, including two-track and single-track trails, sandy flats, and limestone hills, culminating at the summit of Pilot Hill, offering stunning views of the surround..

The Reuter-Hess Trail Run is a unique running event held in Parker, Colorado, featuring a challenging 10k course and a 1-mile kids' race. The race is designed with staggered starts based on age and gender, allowing participants of all ages a fair chance to compete. The course includes a mix of smoot..

The North Fork 50 Mile/50K is an ultramarathon set in the picturesque Colorado mountains, just southwest of Denver. This event features a challenging course that is entirely on soft surfaces, primarily consisting of singletrack trails, with some sections of double track. Runners will experience dive..

The Crazy Legs 10k+ Trail Run is an exciting running event taking place at Devil’s Backbone Open Space in Loveland, Colorado. Scheduled for June 1, 2025, this trail run offers participants a challenging course marked by flour arrows, with hydration stations provided along the route. Runners can enjo..

The Summits Trail Runs, hosted at Granby Ranch Resort in Colorado, is an exciting trail running event that features a variety of distances, including ultra options. Participants can choose from courses ranging from 6 to 43 miles, all set against the stunning backdrop of the Rocky Mountains. The even..

The Barr Lake Trail Race, taking place in Brighton, Colorado, on June 14, 2025, is a celebrated running event now in its sixth year. It features one of Colorado's flattest and fastest courses, with minimal elevation gain, making it ideal for both seasoned runners and newcomers. Participants can choo..

Estes Park's Backyard Ultra is a unique ultra-running event set against the stunning backdrop of Lake Estes, Colorado. Participants must complete a distance of 4.252 miles within one hour, every hour, until only one runner remains. This format continues indefinitely, with the last runner standing be..

The Sunset Trail Running Festival, taking place in Gold Hill, Colorado, features a variety of trail races including a 28K, 12K, 5K, and a Kids 1K. This event, organized by The Boulder Watershed Collective and T.E.A.M Boulder, aims to raise funds for wildfire preparation and community resilience init..

The Timberview Trail Run is a scenic trail running event held at Lory State Park in Colorado, featuring three race distances: 5K, 5 Mile, and 10 Mile. Scheduled for June 28, 2025, this event caters to athletes of all levels, including beginners and families, with a beginner-friendly 5K route. Partic..

Chase the Moon is an exciting 12-hour endurance running event taking place in the Highlands Ranch Backcountry trail system. Participants can choose to run solo or form teams for a relay, with options for 3-person and 5-person teams. The race begins at sunset and continues through the night, illumina..