Colorado 2025 Marathons

The Run Through Time Trail Marathon in Salida, Colorado, challenges runners with its rugged course, featuring a 4,000-foot elevation change through stunning high-altitude terrain. This race, held on March 8, 2025, offers a unique test of endurance and spirit, while also fostering community support, as proceeds benefit local trails and rescue services.

The Colorado Marathon takes runners on a scenic 26.2-mile descent from Steven’s Gulch through the picturesque Poudre Canyon, dropping 1,200 feet to the vibrant streets of Downtown Fort Collins. Known for its breathtaking mountain vistas and high Boston qualification rate, this race combines natural beauty with the thrill of setting personal records, making it an unforgettable experience for every participant.

The Denver Colfax Marathon takes runners on a scenic 26.2-mile journey through the heart of Denver, featuring a double pass through Empower Field at Mile High and breathtaking views of the Rockies as they circle Sloan's Lake. As one of the largest marathon events in the Rocky Mountain region, it combines urban landscapes with vibrant community support, offering an unforgettable experience for both seasoned marathoners and newcomers.

The Spirit Trail Race in Buena Vista, Colorado, features a demanding marathon course that navigates the rugged single-track trails of the Four Mile Travel Management Area, reaching elevations up to 2850 meters. Scheduled for May 25, 2025, this event not only challenges runners with its technical terrain but also fosters a vibrant community atmosphere, culminating in a festive finish with local food, drinks, and vendor stalls.

The Steamboat Marathon challenges runners with a breathtaking descent from the high-altitude start in Hahns Peak Village, winding through the picturesque Elk River Valley and culminating in downtown Steamboat Springs. This Boston-qualifying race combines a stunning natural backdrop with a warm, small-town atmosphere, offering a meticulously organized event that feels both intimate and rewarding.

The Estes Park Marathon offers runners an exhilarating challenge with its high-altitude course, featuring a 1,500-foot descent and sweeping views of Rocky Mountain National Park. This race combines diverse terrains and significant elevation changes, making it a bucket-list event for those seeking both adventure and natural beauty in their marathon experience.

The Leadville Trail Marathon challenges runners with its rugged 26.4-mile course through the Rocky Mountains, featuring steep ascents and high-altitude terrain peaking at 13,185 feet, making it the highest trail marathon in the USA. As part of the prestigious Leadville Race Series, this mid-summer event offers a unique blend of natural beauty and demanding conditions, supported by enthusiastic volunteers and strategically placed aid stations, providing a memorable experience for those seeking to push their limits.

The Aspen Valley Marathon features a stunning downhill course that descends over 1,400 feet from the picturesque town of Aspen to Basalt, following the scenic Rio Grande Trail through the majestic Colorado Rockies. This Boston Marathon qualifier not only challenges runners with its high-altitude start and varied terrain but also rewards them with breathtaking views and a vibrant finish line celebration complete with live music and local cuisine.

The Silverton Alpine Marathon takes runners on a breathtaking journey through the rugged San Juan Mountains, featuring challenging trails that ascend to the impressive California Pass at 12,930 feet. This race offers a unique blend of high-altitude adventure and historical intrigue, as participants navigate past ghost towns and tackle significant elevation gains, all set against stunning alpine vistas.

The Boulder Rez Marathon offers a unique 4-loop course around the scenic Boulder Reservoir, featuring primarily dirt roads and trails with a modest 200 feet of elevation gain and stunning views of the Rocky Mountains. This well-organized event caters to runners of all levels with various race distances and a lively post-race atmosphere, making it a perfect blend of competition and celebration in a picturesque setting.

The Staunton Rocks Marathon takes runners through the stunning trails of Staunton State Park in Colorado's Front Range Mountains, featuring a challenging 4,500-foot elevation gain and breathtaking views over 60 miles. Limited to 300 participants, this race offers an intimate experience with its rich history, potential wildlife encounters, and a celebratory post-race BBQ, making it a memorable adventure for trail enthusiasts.

The Fall Equinox Marathon in Fort Collins, Colorado, features a breathtaking downhill course that starts at the Mishawaka Amphitheater and winds through the vibrant autumn landscapes of the Poudre River Canyon. With its dramatic elevation drop and intimate field capped at 300 runners, this marathon offers a perfect blend of challenge and serene beauty, culminating in a lively finish line celebration with local food, drinks, and music.

The Pikes Peak Marathon challenges runners with a grueling 7,800-foot climb along the rugged Barr Trail, reaching the summit of Colorado's iconic 14,115-foot Pikes Peak. This historic race, known for its breathtaking views and extreme altitude, demands both physical endurance and mental resilience, making it one of the most prestigious mountain marathons in the world.

The Colorado Springs Marathon features a picturesque out-and-back course starting at the historic Colorado Springs Pioneers Museum, navigating diverse terrains from cement to pea gravel, and showcasing stunning views along the Greenway Trail. With a challenging elevation range of 805 feet, it provides a perfect blend of urban and natural landscapes, supported by frequent water stations and a welcoming community atmosphere.

The Windsor Marathon in Colorado offers a picturesque course through Pelican Lakes and the Poudre River Trail, featuring diverse race options including a full marathon, half marathon, 10K, and 5K. This event is not just a race but a vibrant festival, complete with a post-race celebration, community spirit, and support for local nonprofits through Windsor Gives.

The Long View Marathon takes runners on a scenic journey from Fort Collins to Loveland, Colorado, featuring a course that combines rolling hills, gentle descents, and stunning views of the Front Range Peaks. This city-to-city race, a collaboration between Gnar Runners and Sweetheart City Racing, not only challenges participants with its fast Boston-qualifying route but also immerses them in the breathtaking natural beauty of Northern Colorado.

Starting at the lofty Boreas Pass, the Breckenridge Road Marathon plunges runners into a stunning alpine descent, showcasing the vibrant fall colors of the Rocky Mountains. Known as "America's Highest Road Marathon," it culminates in downtown Breckenridge with a lively celebration of music and food, offering a well-supported and unforgettable high-altitude running adventure.

The Blue Sky Trail Marathon in Fort Collins, Colorado, presents a 26.2-mile journey through the breathtaking landscapes of Horsetooth Mountain Park and Devil's Backbone, featuring a challenging 3,500 feet of elevation gain and 90% singletrack terrain. With a nine-hour cut-off time, this marathon invites both seasoned and novice trail runners to experience Northern Colorado's natural beauty, culminating in a vibrant post-race celebration with a BBQ and sponsor giveaways.

The Rim Rock Marathon takes runners through the dramatic landscapes of the Colorado National Monument, with a challenging 2,000-foot climb that rewards participants with awe-inspiring views of canyons and red rock formations. This marathon is a true test of endurance, blending rigorous terrain with a supportive community atmosphere, and proceeds benefit local student-athlete scholarships, adding a meaningful purpose to the race.