Colorado summers are made for running. With crisp mountain air, stunning alpine scenery, and a race scene that balances challenge with pure fun, there's no better place to chase a half marathon this season. Whether you're eyeing a high-altitude PR or just want an excuse to spend a weekend in the Rockies, these four upcoming races deserve a spot on your calendar.
Slacker Half Marathon-Relay-4-Mile Races
Date: Saturday, June 27, 2026
Location: Georgetown, Colorado
This race has earned a devoted following for good reason. The course winds along the Clear Creek valley, offering beautiful views and a supportive, community-focused atmosphere. With a half marathon, relay, and 4-mile options, it's perfect for runners of all levels. Plus, the post-race festivities are legendary.
Steamworks Half Marathon
Date: Saturday, June 6, 2026
Location: Durango, Colorado
Kick off summer in Durango with a race that pairs a scenic, fast course with a well-deserved craft beer at the finish line. Hosted by Steamworks Brewing Company, this event captures the best of Colorado running: mountain views, a lively start line, and a celebration that makes the miles worth every step.
Byers Peak Stampede Half Marathon & 5K Run
Date: Saturday, August 22, 2026
Location: Fraser, Colorado
Set near Winter Park, this race treats runners to jaw-dropping views of Byers Peak. The course is challenging but rewarding, with a small-town feel that makes you want to linger after the finish. It's a late-summer gem that combines natural beauty with genuine local hospitality.
TBK Bank Thirsty 13 Half Marathon
Date: Saturday, August 29, 2026
Location: Durango, Colorado
Back in Durango, this race closes out summer with a scenic loop through the Animas River Valley. The course is known for its rolling terrain and festive finish area. It's a great way to wrap up the season, with plenty of local flavor and a finisher's party that keeps the good vibes rolling.
Ready to find your next Colorado half marathon? Visit our full directory of upcoming races to see all the options and register today.