Sep 27, 2026
Distance — 21.1K
Type — Running
12:30
US$159.00
Sep 27, 2026
Distance — 42.2K
Type — Running
12:30
US$169.00
Sep 27, 2026
Distance — 5K
Type — Running
13:00
US$54.00
Sep 27, 2026
Distance — 10K
Type — Running
13:30
US$69.00
Sep 27, 2026
Distance — 0.6K
Type — Running
14:30
US$29.00
These values represent the 3-year monthly averages for September in Boulder.
Learn more about the host city, Boulder.
Boulder is a college town of about 106,000 in the Front Range region of Colorado. The home of the University of Colorado, the city has a reputation for progressive values and outdoor recreation. It is a very pleasant place to live and visit.
Read more launchRead what other athletes have to say about their experience at the Boulderthon powered by lululemon: The Boulder Marathon.
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