Trail Running calendar near Longmont 2026-2027

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.

A fall trail event at Indian Creek Campground in Sedalia Colorado offering 5 Mile to 50 Mile distances on single track through montane forest, aspens, grasses and red rock views. Aid stations, limited camping, and mid race drop down options..

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 in Lakewood CO offering 5 km, 15 km, a 5 plus 15 double, and a kids 1 km with a stuffed bear for finishers. Courses are mostly dirt, single and double track, and fully marked.

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.

Test your limits on a scenic and flat one mile dirt loop in Fort Collins. Choose between 6, 12, or 24 hour durations with full course support and a welcoming community atmosphere.

A trail race in Louisville, Colorado offering half marathon, 10 km and 5 km distances on dirt trails with views of the Flat Irons. The event includes aid stations, drop bag service and post race festivities in a family friendly setting.

A high-elevation trail event at Staunton State Park offering 50k, 16 mile and 8 mile options with a 250-runner field, park-and-ride logistics, and winter course contingencies.