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Boulderthon Boulder Marathon
Boulder, CO, USA
28 Sep, 2025 (Sun)
Running
5 km, 10 km, 21.1 km, 42.195 km
About the event
The Boulderthon Boulder Marathon offers a scenic and challenging experience for runners, featuring a course that blends mountain views, rolling hills, and the picturesque landscapes of Boulder, Colorado. The event includes a full marathon, half marathon, 10K, and 5K, all of which are designed to showcase the natural beauty of the area. Runners will pass through Boulder’s iconic flatirons, enjoy gorgeous mountain views, and navigate along the Boulder Creek Path. With a supportive local crowd and a relaxed, laid-back atmosphere, it’s an event that blends athleticism with Boulder’s outdoor lifestyle.
Races offered by this event
You have 16 weeks to prepare
About this location
Leaflet © OpenStreetMap contributors
Boulder is renowned for its outdoor culture and natural beauty, making it a top destination for runners and outdoor enthusiasts alike. Beyond the race, you can explore the University of Colorado, hike the Flatirons, or visit the lively Pearl Street Mall for shopping and dining. Boulder’s vibrant local culture and proximity to the Rocky Mountains make it an ideal location to visit.
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