Trail Running calendar near Downtown 2025-2026

The Bear Chase Race Endurance Festival unfolds at Bear Creek Lake Park in Lakewood, Colorado, and offers six races: 100K, 50 Mile, 50K, Half Marathon, 10K, and 5K (with a Baby Bear 10K variant). The mostly dirt, single-track course is described as fast by trail standards and not overly technical, wi..

The Above the Clouds Ultra is an annual trail running event held in Woodland Park, Colorado, known as the "City Above the Clouds." It features two race distances: a 50K ultra and a 10K. The course showcases stunning Colorado fall colors and offers fast, flowing singletrack trails around Rampart Rese..

The Suffer Better Fall Trail Run is an annual mountain endurance event held at Staunton State Park, Colorado. The 9th edition, scheduled for October 11, 2025, features challenging courses including 50K and 25K distances, a unique 25K Fishslappers division involving fish catching, and a new 5K race...

Bobcat Trail Race is a city-adjacent trail running festival held in Palmer Park, Colorado Springs. The event offers four distances: 50K, 25K, 10K, and 5K, letting runners choose an urban wilderness experience just minutes from downtown. The course winds through Palmer Park’s rocky bluffs and single-..

The Great Trailhead Foot Race 10 Miler takes place at Bear Creek Lake Park in Lakewood, Colorado, offering runners a scenic trail experience with single-track dirt paths against the backdrop of Denver’s skyline. Participants can choose between a 5-mile or a challenging 10-mile double-lap course. Reg..

The Indian Creek Trail Runs, part of the Human Potential Running Series, is an annual fall trail running event held at Indian Creek Campground in Sedalia, Colorado. Celebrating its 12th year, it offers multiple race distances: 5-Mile, 15-Mile, 55k, and 50-Mile, with time limits of 12 to 14 hours dep..

Beware The Bear Trail Races take place at Bear Creek Lake Park in Lakewood, Colorado, offering 5km, 15km, and a combined 5+15km double race, along with a 1km kids' run. The courses feature mostly dirt trails with a mix of single and double tracks, incorporating short steep hills, rollers, and varied..

Bridge Burner Ultra is a Canon City, Colorado-based trail race offering 35 Mile, 50K, 35K, and 10K options. The single-loop course travels along the Arkansas River, through Tunnel Drive tunnels, and climbs to 7,109 feet for sweeping views of the Royal Gorge and Pikes Peak. Runners traverse Royal Gor..

The HRCA Backcountry Wilderness Half Marathon is an annual 13.1-mile trail race held in Highlands Ranch, Colorado, featuring a scenic single-loop course through the Douglas County East/West trail and the Backcountry Wilderness Area. The race offers a challenging route on dirt, gravel, and singletrac..

BINGO! Trail Party, a Human Potential Running Series event, is held at May Farms in Byers, Colorado. It offers five levels: Level 1 6–10 miles, Level 2 8–20 miles, Level 3 10–42 miles, Level 4 10–54 miles, and Level 5 18–54 miles. Runners traverse a flat, pavement-free course of single/double-track..

The Colorado Cold Rush Ultra is a winter trail running event held in Colorado Springs, featuring 50K, half marathon, and 10K distances. The race courses showcase diverse terrains and stunning views, including historic High Drive and the tunnels from the Colorado gold rush era. The 50K starts at Bear..

The Sawmill Trail Runs is an annual trail running event held at Staunton State Park in Pine, Colorado, approximately 40 miles southwest of Denver. The race offers three distance options: 8-Mile, 16-Mile, and 50k, with a combined runner capacity of 250. The course features scenic and challenging terr..

Stories Ultra, part of the Human Potential Running Series, takes place at Cheyenne Mountain State Park in Colorado Springs, Colorado. The 9th annual weekend offers 6-Hour and 15-Hour timed events plus traditional distances: 10K, Half Marathon, and 20-Mile. The atmosphere centers on a community vibe..

The 21st Annual Run Through Time Trail Marathon and Half Marathon takes place in Salida, Colorado, featuring challenging courses on dirt and jeep roads as well as narrow, hilly single-track trails with stunning views of Salida and the Arkansas Valley. Elevations range from 7,000 to 9,000 feet. The e..

The Rattler Trail Race, held in Colorado Springs at Palmer Park, offers runners a chance to experience scenic singletrack trails with panoramic views of the city and Pikes Peak. The event features multiple distances: 50K, 25K, 10K, and 5K, catering to various skill levels. The course is known for it..

Take 5 in the Garden is a scenic running event held in Colorado Springs, CO, within the stunning Garden of the Gods park. The race offers multiple distances including a 5K, 5 Miler, 5 Mile Trail, and a longer 9.5-mile Double Take course. The park is closed to traffic during the event, allowing runne..

Niwot’s Challenge, the 13th annual event, takes place in Sedalia, Colorado along the South Platte River. It isn’t a race but a reckoning, a Barkley-inspired grassroots ultrarunning ordeal of secrecy and mischief. The course is unpublished and largely off-trail—a riddle of rock, bushwhack, and bruise..

The Greenland Trail Races, held annually in May at Greenland Open Space in Larkspur, Colorado, offer four trail running distances: 4 miles, 8 miles, 25K, and the 50K ultramarathon, known as Colorado's fastest 50K. The course features wide, smooth dirt trails through native grasslands, ponds, oak hil..

The Valkyrie Trail Race, held in Cheyenne Mountain State Park near Colorado Springs, Colorado, is a women-focused trail running event offering distances from 4 miles up to 50 kilometers. The course begins on crushed limestone meadows before transitioning to singletrack trails ascending Cheyenne Moun..

Endure Trail Runs, hosted by the Human Potential Running Series, is an annual event held at Mueller State Park in Divide, Colorado. The 6th edition features multiple race options including a unique 12-Hour timed event where runners draw colored balls to determine their next loop, a marathon, half ma..