Trail Running Calendar Colorado 2024-2025

Welcome to Colorado's premier trail running calendar for 2024-2025! 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.

The Royal Gorge Whitewater Festival Trail Runs will take place in Cañon City from Friday 26 July 2024 to Saturday 27 July 2024. You can run between 5 and 10 kilometers.

The Never Summer 100km is a challenging ultra-distance mountain-running event that takes place in State Forest State Park, running between the Never Summer Mountains and the Medicine Bow Mountains. The race covers a variety of terrains, including alpine ridges, peaks, lakes, meadows, and streams. Pa..

The Pikes Peak Ultra is an annual trail running event in Colorado Springs, organized by Mad Moose Events. It features multiple race distances, including 20K, 30K, 50K, and 50 Mile courses. The event showcases some of the best trails in the area, starting at Bear Creek Regional Park and traversing th..

The Mountain Fair 4-Miler will take place in Carbondale on Saturday 27 July 2024. You can run 4 miles.

The Elevation Run/Walk is an annual event held in Conifer, Colorado, featuring a 10K race, a USATF-certified 5K race, and a 2-mile fun run. The event takes place in the scenic Aspen Park area, with an average elevation of 8,200 feet. Participants receive a race t-shirt, goodie bag, and access to pos..

The Creede 100 is a 100-mile running event that takes place in Creede, Colorado, a historic mining town known for its abundant beauty. The race starts and finishes in town, where mining traditions are still celebrated in Basham Park. Runners will experience breathtaking views of the San Juan Mountai..

The Grand Mesa Ultras is a running event held in Grand Mesa, Colorado, featuring a 50-mile race, 55K, and 30K distances. Runners can enjoy challenging mountain trails with rocky technical climbs, forest single tracks, wildflowers, alpine meadows, lakes, and stunning views. Participants can camp on t..

August 2024

The New Castle Dirty Dozen Trail 10K will take place in New Castle on Friday 2 August 2024. You can run 10 kilometers.

The Emerald Mountain Epic, formerly known as the Steamboat Stinger, is a challenging running and mountain biking event held in Steamboat Springs. The race features some of the finest singletrack trails in the area, with courses that include significant elevation gains. The event includes various cat..

The Sheep Mountain Ultras, part of the Human Potential Running Series, features its 10th annual event on August 3, 2024, in Fairplay, Colorado. This challenging trail running event offers three distances: a 50-mile race, a 50k, and a half marathon, all set against the stunning backdrop of the South ..

The Kennebec Mountain Run is a challenging 15-mile trail race set in the picturesque La Plata Mountains of southwest Colorado. Participants will navigate a rugged course with 3,100 feet of elevation gain, reaching a peak altitude of 12,200 feet at Kennebec Pass. The race offers breathtaking views of..

The Berry Picker Trail Run is a challenging 4.6-mile uphill race on singletrack and doubletrack terrain at Vail Mountain, CO. The race starts at the base of Gondola One and finishes at Mid-Vail. With an average grade of 14 percent, runners will ascend Berry Picker Trail and Lower Fireweed before fin..

The Eltuck Valley 5K is the inaugural race in a series of midweek trail races held in Bellvue, CO, starting on August 6, 2024. This event is designed to cater to both novice and experienced trail runners, offering a fast and flat 5K course with a 250' elevation gain. The series aims to provide a fun..

The Lory Summer Trail Series, held from August 6-27, 2024, is a set of midweek trail races at Lory State Park in Fort Collins, Colorado. The series includes four races of varying distances: 5K, 10K, and 12K. Designed to cater to both novice and experienced trail runners, the event aims to provide a ..

The High Five 100 is a challenging 100-mile running event in Lake City, CO, created by local ultra runners in 2018. Participants must navigate on foot to 22 specified locations, including proof points and checkpoints, with only limited aid allowed at checkpoints. The route involves summiting five 14..

The Turkey Springs Showdown Trail Races, organized by Wolf Song Running Adventures, take place in the scenic Turkey Springs area near Pagosa Springs, Colorado. This event features a 10k and a Half Marathon, with the race course starting and finishing at the Turkey Springs Guard Station. Participants..

Dirt Circus - Boulder is a vibrant community running event taking place in Boulder, Colorado, on August 10, 2024. Organized by UltraSignup, this festival celebrates local races, run clubs, and businesses, fostering camaraderie among trail running enthusiasts. Participants can enjoy a social run with..

The Holy Cow Trail Stampede is an exciting running event featuring 10k and 5k distances, designed to bring the community together on the trails. Participants can enjoy a performance blend tech tee and have the option to join a team for a discount. The event supports Growing Home, a nonprofit focused..

The "Run the Rockies Trail Race" in Frisco, Colorado, offers a 5k, 10k, and Half Marathon, guiding runners through the scenic Frisco Peninsula trails with stunning views of Lake Dillon and the Ten Mile Range. This event is ideal for both first-time half-marathoners and seasoned runners, featuring si..

The Transrockies Run will take place in Buena Vista from Monday 12 August 2024 to Saturday 17 August 2024.