Boulderthon Half Marathon is expected to sell out. Over 4,000 runners are expected at this year’s Boulderthon from 50 states and 13 countries, with registrations coming in over 2x the rate of last year. 5k, 10k, Full Marathon are Nearing Capacity. Register today.
aerial view of Universtiy of Colorado stadium


Boulderthon races will take place on Saturday, October 8th and Sunday, October 9th 2022. The top-rated race series became the second largest marathon event in Colorado in only its first year of existence, and the largest full running event in Colorado.

Boulderthon draws runners from 48 states in the US as well as over a half dozen countries around the world, as the signature city marathon showcases Boulder’s beautiful downtown and spectacular views of the Flatirons.

Please review our impacts below.

Saturday Garage Access Map

Sunday Garage Access Map

Downtown Access Map

Saturday No Parking Map

Sunday No Parking Map

Interactive Course Map: Boulderthon Half Marathon, Marathon, 10k (Sunday, 10/9)

Interactive Course Map: Boulderthon 5k (Saturday, 10/8)

Door Hanger

Save The Date

Download the Waze App to Avoid Road Impacts!

Download the free Waze App on your smartphone to help avoid road impacts on Race Weekend. Type Waze into your app store or visit for more information.

No Parking Zones

Areas along the route will be marked as “No Parking Zones.” Please adhere to the dates and times posted; all zones will be enforced. Please reference our No Park Zones as well as our Weekend Road Impacts

Fore more information, please email Our most up to date impacts will be posted here. Information is updated as of August 1st 2022 and subject to change.