Start Line: 19th & Pearl
Fleet Feet Boulder Cheer Zone: 2775 Pearl Street, Boulder, CO 80302
lululemon Cheer Zone: 47th Street and Independence Road, Boulder, CO 80301 – South of Independence
lululemon Power-Up Zone: Pleasant View Fields parking lot, at approximately mile 22.5 of the marathon and mile 9.5 of the half marathon. Send a message to your runner! If they’re running with the Boulderthon App, they can hear your voice cheer along the course, and your message may appear on the big screen here.
Last Mile: Folsom & Spruce toward Pearl & 16th
Finish Line: 16th & Spruce
Start Time: 7:00AM
3:00, 3:15, 3:30, 3:45, 4:00, 4:30, 5:00, 5:30
Pacing provided by BEAST Pacing
Start Time: 7:00AM
1:30, 1:45, 2:00, 2:15, 2:30, 2:40
Pacing provided by BEAST Pacing
Boulderthon was named among the Best Fall Marathons by Runner’s World, the Best Half Marathon in Colorado, and one of the Top 13 Most Beautiful Half Marathons in the World. Now in its sixth year, Boulderthon welcomes over 15,000 runners from all 50 states and 22 countries. Join us on Sunday, September 27, 2026, for the largest September running weekend in the U.S. in beautiful Boulder, Colorado.
Start Time: 8:10AM
Experience one of Colorado’s most scenic and exciting race weekends, powered by the natural recovery benefits of Cheribundi.
Cheribundi’s all-natural tart cherry juice is scientifically proven to reduce inflammation, improve sleep, and speed up recovery. Trusted by 475+ professional and collegiate sports teams, it’s the natural recovery choice for athletes and runners.
Start Time: 7:45AM
BCH is excited to partner with Boulderthon to present the 5K event, the Heart to Heart 5K. Research has shown that physical activity is one of the most important things you can do for your health, particularly cardiovascular health. Physical activities, such as running and walking, have been shown to reduce heart attacks, strengthen heart muscles and reduce blood pressure, amongst other benefits.
Start Time: 8:25AM
Join us on Sunday, September 26th, 2027 at 8:25AM for the fourth-annual Boulder Country Day School Kids Fun Run in Boulder, Colorado. The course starts at 19th and Pearl and ends with an incredible finish on the historic Pearl Street Mall! The Boulderthon is the perfect introduction to racing for your little ones! Parents can run for free with their child!?
Staged in the Happiest City in America (National Geographic), this is a race weekend that feels as good as it looks.
Now it’s time to experience it! Register today and join thousands of runners at the start line.
