Trail Running calendar near Erie 2025-2026

The Into the Hills Eltuck 5K is part of a series of midweek trail races held at Lory State Park in Bellvue, Colorado. Scheduled for August 19, 2025, this event features a challenging course with a steep climb and descent, making it suitable for both novice and experienced trail runners. Participants..

The NoCo Urban Ultra & Relay is a long-distance running event taking place on August 22-23, 2025, along the scenic Poudre River Trail in Northern Colorado. Participants can choose from a 50-mile solo race, a 100-mile solo race, or relay options for both distances. This inaugural event, organized by..

The Staunton Rocks! Marathon and Half Marathon, scheduled for August 23, 2025, is a premier trail running event held in Staunton State Park, Colorado. Designed by trail runners for trail runners, the event features a challenging yet accessible course that showcases the park's stunning landscapes, in..

The Byers Peak Stampede Half Marathon & 5K Run is an exciting running event set in the stunning Rocky Mountains, just 60 miles from Denver. Scheduled for August 23, 2025, the event features a challenging half marathon and a 5K run, both designed for athletes of all levels. The half marathon course p..

The Westminster Night Trail is an exciting running event held at Standley Lake in Westminster, Colorado, celebrating its 12th year. Participants can choose from various distances, including 50K, 35K, half marathon, 10K, and 5K, all set against the stunning backdrop of the lake and mountains. The cou..

The Eltuck Valley 12K is part of the Lory Summer Trail Series, taking place at Lory State Park in Bellvue, Colorado. This event is designed for both novice and experienced trail runners, offering a fun and low-key atmosphere. The series includes multiple races, culminating in the 12K distance, which..

The Front Range Ultra Dayze is an exciting ultra-running event taking place in Loveland, Colorado, from August 28 to September 1, 2025. This festival features a variety of ultra-distance races, including 200-mile, 100-mile, and timed events ranging from 12 to 100 hours. Participants can camp for fre..

The American Heroes Run is a commemorative running event held in Longmont, Colorado, designed to honor the heroes of 9/11 and celebrate patriotism. Participants can choose from various race distances, including a 100-mile run, marathon, half-marathon, 9.11-mile run, and a 5K, among others. The event..

Devil on the Divide is a challenging trail running event held in Empire, Colorado, featuring two race distances: a 50K and a 22K. Participants will experience breathtaking views of Clear Creek County and the Continental Divide, with the 50K course reaching altitudes over 13,000 feet and involving ov..

The Cirque Series at Arapahoe Basin is a thrilling mountain running event scheduled for September 6, 2025. Participants will tackle a challenging 9.4-mile course with an elevation gain of 2,411 feet, starting from the base at 10,780 feet. The route features stunning views and a mix of established tr..

The HRCA Wildcat Mountain Trail Races, scheduled for September 6, 2025, in Littleton, Colorado, features a variety of events including a 10-mile race, a 10K, and a Kid's Race. The races start at the Douglas County East/West trailhead and traverse the scenic HRCA Backcountry Wilderness Area. Particip..

The Black Squirrel Half Marathon, scheduled for September 6, 2025, takes place in Lory State Park near Fort Collins, Colorado. This challenging 13.5-mile race features approximately 2,000 feet of elevation gain and descent, offering runners stunning views of Horsetooth Reservoir and the Rocky Mounta..

The Ned Ned Run is a celebrated running event held in Nederland, Colorado, known for its scenic mountain trails. This year marks the 43rd edition of the event, featuring a variety of race options including a Half Marathon, 10K, and 5K road run. Participants can enjoy the beautiful landscapes while c..

The Snow Mountain Ranch Trail Running Festival, taking place in Granby, Colorado, offers a stunning backdrop for runners of all levels. Participants can choose from various race distances, including a 50K, 33K, Half Marathon, 10K, and 5K, all set against the picturesque scenery of rolling hills and..

The Pony Express Trail Run is a scenic trail running event held at Rampart Reservoir, featuring two distance options: 8.5 miles and 16 miles. Set at an elevation of over 9,000 feet, participants can enjoy beautiful single-track trails, creeks, and local wildlife amidst Colorado's autumn scenery. The..

The Red Feather Trail Jamboree is a three-day trail running event scheduled for September 26-28, 2025, in the scenic Red Feather Lakes region of Northern Colorado. Organized by trail runners for trail runners, the event features multiple race distances, including a 50-mile, 50K, and half marathon, a..

The 24 Hours Of Palmer Lake will take place in Palmer Lake from Saturday 27 September 2025 to Sunday 28 September 2025.

The Bear Chase Race is an exciting endurance festival held at Bear Creek Lake Park in Lakewood, Colorado. Scheduled for September 27-28, 2025, the event features a variety of race distances including a 100K, 50 Mile, 50K, Half Marathon, 10K, and 5K. This race is ideal for both novice and experienced..

Rocky's Backyard Ultra is an exciting ultra trail running event held in Estes Park, Colorado, at the YMCA of the Rockies. This unique race format requires participants to complete a 4.167-mile loop every hour until only one runner remains. The course features stunning Rocky Mountain scenery, with ap..

The Castle Rock Trail Festival is an exciting athletic event that caters to a wide range of participants, from ultra-distance runners to families with children aged 5 to 12. Set against the stunning backdrop of Philip S. Miller Park and Ridgeline Open Space, the festival features various race option..