Trail Running calendar near Frederick 2026-2027

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 autumn colors of Colorado during this scenic 5K trail run. Participants race through Breckenridge's mountain trails before finishing at a historic downtown festival featuring traditional music and food.

Test your endurance at this mountain trail event featuring 25 km and 50 km distances. Join a community dedicated to environmental conservation and public land protection on the beautiful trails of Colorado.

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.

Explore the scenic Philip S. Miller Park ridgeline trails with distances ranging from a 5K to a 50K ultramarathon. This festival features professional timing, finisher medals, and a family friendly obstacle course.

Experience the beauty of the Colorado Front Range at the Indian Creek Trail Runs. Choose from four distances on scenic single track trails through pine forests and golden aspen groves near Sedalia.

Experience the scenic redstone hardpack of Northern Colorados Front Range mountains. This event offers marathon and half marathon distances on singletrack trails with moderate elevation and generous time limits.

Experience single track trail running at Bear Creek Lake Park with views of the Denver skyline. Choose between 5 and 10 mile distances followed by a post race party including a finisher meal and park entry.

Trail races at Bear Creek Lake Park offering 5 km, 15 km, a 5 km plus 15 km double, and a Kids 1 km. Main race registration includes socks or a neck gaiter and a pancake breakfast while kids receive a stuffy at the finish.

Experience 13.1 miles of singletrack trails and hills in the Highlands Ranch Backcountry Wilderness Area. Enjoy custom medals and a post race pancake breakfast while competing for cash prizes in various categories.

Experience the scenic beauty of the Front Range at this annual Colorado trail event featuring half marathon, 10K, and 5K distances on mostly dirt paths with views of the Flatirons.

Experience the rugged beauty of Staunton State Park at the Sawmill Trail Runs. Choose between 50km, 16 mile, or 8 mile distances through Colorado meadows and granite cliffs in this late season mountain challenge.