Trail Running Calendar Colorado 2026-2027

Welcome to Colorado's premier trail running calendar for 2026-2027! Recognized as a trail runner's haven, Colorado seamlessly blends bustling urban settings with pristine mountain terrains. Whether you're a native, a newbie, or a visitor exploring the Centennial State's running trails, our calendar ensures you don't miss out on any event.

Denver, the renowned Mile High City, beckons runners with its urban-meets-nature charm. Iconic routes like the Cherry Creek Trail zigzag right through the city's pulse. Venturing south, Colorado Springs, dubbed the "Olympic City", boasts of trails skirting the monumental Garden of the Gods. Here, a run transcends the ordinary, offering an experience akin to striking gold.

For those seeking a quiet escape, Aurora presents peaceful reservoir paths, making urban detox achievable. If the allure of academic vibes mixed with nature captivates you, Fort Collins and its famous Horsetooth Reservoir trails won't disappoint. Meanwhile, Lakewood introduces runners to nature's canvas with the Red Rocks painting every run. And let's not forget Boulder, offering a diverse range of trails set against the stunning backdrop of the Flatirons.

A classic four-race trail series in Colorado Springs parks, with distances growing each week from 3.8 to 7.4 miles. Awards celebrate those who complete the entire cross-country challenge. The long-running event enforces strict safety rules..

Distances and Time Limits The Indian Creek Trail Runs is a multi-distance trail running event offering four options: A 50-mile race and a 55k (approx. 34 miles) race, both with a 14-hour time limit. A 15-mile race and a 5-mile race, both w..

Bobcat Trail Races The Bobcat Trail Races take place in Palmer Park in Colorado Springs, Colorado. The event features four trail running distances: 50K, 25K, 10K, and 5K. The course runs through an urban park setting, showcasing views of th..

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 and dirt trails at Bear Creek Lake Park with views of the Denver skyline. Enjoy a 5 or 10 mile race featuring park entry, a finisher meal, and a post run party.

A classic four-race trail series in Colorado Springs parks, with distances growing each week from 3.8 to 7.4 miles. Awards celebrate those who complete the entire cross-country challenge. The long-running event enforces strict safety rules..

Methodist Mountain Ultra The Methodist Mountain Ultra (MMU) is a trail race set on the Methodist Mountain trail system near Salida, Colorado. It takes place at the northern end of the Sangre de Cristo mountains. The event features two dista..

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.

The Bridge Burner Ultra offers a scenic single-loop course near Cañon City, Colorado, with distances from 10k to 35 miles. Runners traverse historic tunnels, cross the highest US bridge, and enjoy expansive mountain views. It's a late-seaso..

November 2026

A classic four-race trail series in Colorado Springs parks, with distances growing each week from 3.8 to 7.4 miles. Awards celebrate those who complete the entire cross-country challenge. The long-running event enforces strict safety rules..

The Kessel Run Ultra offers five trail distances through the North Fruita Desert. The course features flowing singletrack and views of the San Juan Mountains. It's a cupless event with race shirts and finisher medals for all participants.

Experience a scenic singleloop trail race through the Highlands Ranch Backcountry Wilderness on a course of pure dirt and singletrack. Enjoy hills, mountain views, and a postrace pancake breakfast in Lone Tree.

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.

A classic four-race trail series in Colorado Springs parks, with distances growing each week from 3.8 to 7.4 miles. Awards celebrate those who complete the entire cross-country challenge. The long-running event enforces strict safety rules..

A winter running event in Colorado Springs with three trail distances: 10k, Half Marathon, and 50k. Runners explore historic High Drive and gold rush tunnels on courses with significant elevation. Registration includes a shirt, beanie, and..

A classic four-race trail series in Colorado Springs parks, with distances growing each week from 3.8 to 7.4 miles. Awards celebrate those who complete the entire cross-country challenge. The long-running event enforces strict safety rules..

December 2026

The Sawmill Trail Runs offer three scenic trail distances at Staunton State Park in Colorado. This popular event with limited capacity requires off-site parking and a shuttle. Participants should prepare for unpredictable December mountain..