Trail Running calendar near Lone Tree 2026-2027

Experience the highest trail marathon in the USA reaching 13185 feet at Mosquito Pass. Choose between a 26.4 mile marathon or a 15.46 mile heavy half through Leadvilles historic mining district and rugged high altitude terrain.

An overnight endurance event in Highlands Ranch, Colorado offering solo and team relay options on a 10.3 miles dirt loop beneath a full moon. Two aid stations, drop bags, medical support and a headlamp requirement are provided.

A Backyard Ultra around Lake Estes where runners repeat 4.252 mile laps on a paved loop until one finishes. The event offers a stocked aid station, a custom hat for participants, and benefits local childcare services.

Experience a half marathon in the mountains of Nederland Colorado. This event features a significant elevation gain of 4226 feet with the summit always in view.

Kick off Independence Day with a 5k run/walk in Winter Park, Colorado. The scenic route travels along the Fraser River Trail and finishes at the Rendezvous Event Center for a post-race party.

A July 4 5K in downtown Leadville held above 10,000 feet, with adult and youth entries and proceeds supporting local youth athletics and recreation.

Experience high altitude trail running through historic Colorado ghost towns and mines at over 10000 feet. Choose from distances ranging from 10 miles to 100 miles in the scenic South Park Valley.

Experience an endurance challenge through historic Colorado mining districts with the Silver Rush 50 Run. Choose between 50 mile, 15 mile, or junior 5k distances while competing for a qualifying spot in the Leadville Trail 100.

Experience a historic 12.6 mile mountain race on Pikes Peak. Runners ascend from Manitou Springs to Barr Camp at 10200 feet before descending the iconic Barr Trail in this classic Colorado summer event.

Experience the mountain trails of Colorado Springs at the Pikes Peak Ultra. Choose from four race distances that take you through high elevation terrain including Cheyenne Canon and the summit of Mt. Rosa.

Experience a historic Colorado tradition where runners and burros compete together. Navigate mountain trails and high altitude passes while carrying traditional mining gear in this unique world championship event.

A single 200 mile loop around Summit County Colorado with roughly 40,000 feet of climbing and altitudes above 9,000 feet. Field is capped at 75 runners and a prior 100 mile finish is required.

Experience an epic 200 mile point to point team relay from Fort Collins to Steamboat Springs. Run through the heart of the Rocky Mountains and over two scenic mountain passes in this ultimate Colorado road race.

Experience high elevation trail running in the mountains of Fairplay Colorado. This event offers three distances ranging from a half marathon on forest roads to technical ultramarathons through remote wilderness terrain.

Experience high alpine racing through the scenic singletrack and forest trails of Winter Park Colorado. Join a point to point mountain adventure with distances ranging from a 10K loop to a technical 50K ultra.

Experience a series of midweek trail races at Lory State Park with distances ranging from 5km to 12km. Enjoy a post-race social with pizza and beverages after navigating the scenic trails of Fort Collins.

Experience the Frisco Peninsula trails with a choice of 5 km, 10 km, or Half Marathon distances. Enjoy a scenic course featuring single track trails and dirt roads with views of Dillon Reservoir and the Ten Mile Range.

Experience a focused trail run through the hills of Lory State Park with 1,700 feet of elevation gain. Enjoy a post-race social with pizza and beer in a scenic outdoor setting limited to 100 participants.

A four-race trail series on Tuesday evenings in August in Lory State Park. Distances include 5K, 10K, and 12K routes with varying elevation. Pizza and drinks follow each race, with series awards at the end.

A multi-distance race at Boulder Reservoir, Colorado, featuring a mostly dirt and trail course with about 200 feet of elevation gain and views of the reservoir and the Rocky Mountains.