Trail Running calendar near Old Town 2026-2027

Experience a high altitude trail run through the Rocky Mountains on 100 percent unpaved roads and trails. This dog friendly event in Fraser supports children facing cancer through the Shining Stars Foundation.

Experience high altitude trail running through the scenic singletrack and historic landmarks of Staunton State Park. Choose between a full or half marathon featuring sweeping mountain views and a festive post-race meal.

A pair of trail races at Curt Gowdy State Park near Cheyenne on August 22, 2026, featuring 4 mile and 8 mile courses through aspens and pines with elevation rising from about 7,300 to 7,700 feet.

Trail half marathon in Evergreen, Colorado on August 22, 2026. The 11 mile course gains over 1,300 feet, tops out just under 9,000 feet, and runs through Elk Meadow and Too Long Trail from Buchanan Park Recreation Center.

Experience a fast and flat 12k trail race through the scenic Valley Trails of Lory State Park. Enjoy a low key atmosphere followed by pizza, beverages, and a vintage race shirt in Bellvue.

Join a family friendly trail event in Aurora featuring 5K distances and a kids run. Enjoy dog demonstrations, a pancake breakfast, and a kids fun zone while supporting therapy and patrol K9 units.

Experience a scenic run in Allenspark with majestic views of Mount Meeker and the Continental Divide. Choose between a competitive 5k or a casual 2k walk and bring your dog along for the race and an amateur dog show.

A multi day ultrarunning event in Loveland Colorado with timed events from 12 hour to 100 hour and distance races up to 200 mile on a two mile loop. Camping, continuous aid, chip timing, and event swag are provided.

Join the community for a 5K run or walk on a brand new dirt course at the North Arvada Middle School Athletic Complex. Support local high school racers before taking on this off road route yourself.

Test your endurance at Staunton State Park with weighted rucking options ranging from 6.5 to 21.5 miles. Choose your load and tackle the Colorado trails to support the Special Forces Foundation.

A commemorative running event in Longmont, CO on a flat loop course, offering multiple race formats including a 100 mile option and virtual entries, with on-course aid, finisher awards, and hot food available during overnight racing.

Experience a historic Colorado mountain tradition in Nederland with trail and road races. Choose between a half marathon, 10K, or a dog friendly 5K while winding through scenic trails and old town streets.

Experience high altitude trail running at the Snow Mountain Ranch Trail Running Festival in Granby. Choose from distances ranging from 5 km to 50 km on scenic dirt and grass paths reaching nearly 10000 feet in elevation.

Experience the scenic trails of Lory State Park in this 13.5 mile mountain race featuring technical singletrack and stunning Rocky Mountain views. Enjoy a well supported course followed by a celebratory pancake breakfast at the finish.

Mountain trail races in Empire, Colorado offering 50K and 22K point to point courses with high altitude and substantial elevation gain. Prior ultra experience is required for the 50K and cut off times are enforced.

Second annual trail race in Golden, Colorado on September 19, 2026 supporting BeyondHome. Courses include a 10 mile North Table Loop route and a 5 mile route on Lithic and Fairmount Canal trails.

Experience the wild spaces of Northern Colorado with a weekend of trail races ranging from a half marathon to a 50 mile ultra through scenic forests and scout camp trails. Stay on site with available camping and community meals.

Experience a rugged trail adventure through the Colorado wilderness in Estes Park. Choose between a 50k run or bike and a heavy half marathon while supporting the local high school mountain bike team.

Experience the scenic trails of Bear Creek Lake Park at this multi day endurance festival in Lakewood. With distances ranging from a 5K to a 100K ultra marathon, the event features fast non technical dirt paths and panoramic views.

Experience the scenic HRCA Backcountry Wilderness Area with trail races for the whole family. Enjoy rolling hills and open views followed by a pancake breakfast and finisher medals for all participants in Littleton.