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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.

Greenland Trail Races

Larkspur

A multi-distance trail event at Greenland Open Space near Larkspur, Colorado on May 2, 2026, featuring 4M, 8M, 25K and a multi-lap 50K that serves as the 2026 RRCA National 50K Championship. The course runs on dirt trails through grasslands..

Take 5 in The Garden

Colorado Springs

A road and trail running event through Garden of the Gods in Colorado Springs with multiple course options, including a 9.5 mile route. The route passes Siamese Twins, Kissing Camels, and Balanced Rock with Pikes Peak as a backdrop.

The Pilgrimage

Mack

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A 150 hour timed trail event near Mack, Colorado where five off road routes form a roughly 55 mile Journey. Crewed and uncrewed divisions run under strict navigation and support rules with a single home base aid station.

Valkyrie Trail Race

Colorado Springs

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Valkyrie Trail Race is a women focused trail event at Cheyenne Mountain State Park on May 9, 2026, offering distances from 4 miles to 50 kilometers across meadow, singletrack and rocky pine forest trails.

Quad Rock 50

Fort Collins

Trail races near Fort Collins offering 25 and 50 mile options on mostly singletrack through Lory State Park and Horsetooth Mountain Park, featuring about 5,500 ft or 11,000 ft of vertical gain, staffed aid stations, and marked trails.

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