Full Marathon | Half-Marathon | 10k | 5k

Home of the 2023 + 2024 RRCA State Marathon Championship

Don’t Run Any Colorado Marathon, Run THE Colorado Marathon

Experience the thrill of running one of Colorado’s fastest downhill races!

Countdown To Race Day | Sunday, May 4, 2025








Let’s Run It Back!

Registration Is Opening Soon for the 2025 Colorado Marathon!

Welcome to the Colorado Marathon, one of the most stunning races in the country! This annual marathon is held in the verdant Poudre Canyon, nestled in the picturesque Rocky Mountains, just outside of the beautiful city of Fort Collins.

We’re thrilled to announce that registration for our upcoming 2025 event will be open soon for all four races, including the full marathon, half-marathon, 10k, and 5k. This event, designated as the RRCA Colorado State Marathon Championship in 2023 and 2024, promises an unforgettable experience for runners of all ages, levels, and abilities. Register with confidence! Racers can change to a shorter distance to match their current fitness and ability. Join us on Sunday, May 4, 2025, for a day of exhilarating running, breathtaking scenery, and the opportunity to push yourself to new heights. But be quick! The 2023 and 2024 races sold out! We appreciate your support, and can’t wait to see you at the starting line in 2025!

The Colorado Marathon has qualified roughly 16-18% of all Boston qualifiers entrants each year.

Experience Running a Scenic Marathon Like No Other

The Poudre Canyon in the Rocky Mountains is a breathtaking landscape that sets the stage for the Colorado Marathon’s full, half, 10k, and 5k courses. Runners are treated to stunning views of the canyon walls and verdant tree-lined slopes rising around them as they wind their way along the banks of the shimmering Cache La Poudre River. The mountain setting makes this race a favorite for the “50 State” runners and others looking for an alternative to another urban marathon.

The crisp mountain air carries the scent of pine and the sound of wildlife, adding to the natural beauty of this incredible setting. Whether you’re an experienced runner or a first-time participant, the natural beauty of the Poudre Canyon will energize and invigorate you every step of the way. So come join us and let the Rocky Mountains inspire you to greatness!

One Day. Four Courses.

A Race for Everyone. Let’s Go!

Full Marathon

Are you ready to conquer Colorado’s fastest downhill full marathon, surrounded by the awe-inspiring beauty of the Rocky Mountains? Let’s do this!

Half Marathon

Half the distance. All the glory! Join us on a breathtaking 13.1-mile race along the stunning Poudre River. It’s not just a race, it’s an unforgettable adventure!


This out-and-back course winds through the natural areas of Fort Collins before returning to the finish line and post-race party. Lace up and let’s go!


Pick up a 5k goal on this course that winds through natural habitats and gorgeous scenery, all while developing endurance, speed, strength, and efficiency!

Years Racing

Scenic Courses

in Charitable Donations

Paper Cups Eliminated Yearly

Fort Collins: Where Your Racing Adventure Awaits!

Fort Collins, also known as the “Choice City,” is a true hidden gem nestled in the foothills of Northern Colorado. It’s a city that seamlessly blends community, adventure, and culture to offer its visitors an unforgettable experience. With over 20 breweries, including world-renowned Odell Brewing Co., Fort Collins has established itself as the craft beer capital of Colorado. But it’s not just about the beer — the farm-to-table dining scene is a foodie’s dream.

Historic Downtown Fort Collins, the inspiration for Disney World’s Main Street USA, offers a charming and unique atmosphere that is both quaint and vibrant. With over 300 days of sunshine a year, an average of 65-75 degrees daily high temperature in May, and low humidity, runners are given excellent conditions for the race. What better way to experience all of this than by participating in the Colorado Marathon?

Our Commitment to Sustainability

The Colorado Marathon is proudly environmentally conscious and committed to sustainable racing. We’ve gone completely digital with our registration process to reduce paper waste and promote sustainable practices. Additionally, our goal is to eliminate paper waste through cupless racing to keep the Poudre River and our course clean. So let’s run towards a greener future together! Thank you for helping us protect and maintain the natural beauty of the Poudre Canyon!

Become a Sponsor for the Colorado Marathon

Becoming a sponsor for the Colorado Marathon is more than just a marketing opportunity — it’s a chance to connect with a community of motivated, successful, and active individuals who are passionate about fitness and wellness. 

With 22+ years of the marathon under our belt, and a 30% growth in runners in the last year alone, the Colorado Marathon has established itself as a premier race for both novice and seasoned runners alike. Our 24,000+ email subscribers are actively engaged in our community, and as a sponsor, you’ll have the unique opportunity to connect with them one-on-one at our expo and post-race party. Our thoughtful strategy from registration to race day ensures a tailored and enjoyable experience for all runners, and your support will be instrumental in making that happen.

As a sponsor, you’ll enjoy unparalleled visibility with our diverse and engaged audience, and you’ll have the satisfaction of knowing that you are contributing to the success of one of the most exciting and well-organized races in the country. Join us today and be a part of something truly special!

Our Sponsors

Interested in Sponsorship opportunities with the Colorado Marathon? Click Here