In its second annual edition, Boulderthon nearly tripled in size, drawing runners from all 50 states as well as 15 countries, as the signature city marathon showcases Boulder’s beautiful downtown and spectacular views of the Flatirons.

No parking garages will be closed during Boulderthon. All parking garages remain fully open for the community & staff.

If you love to shop, there are over 140 retailers downtown, 80% of which are locally owned and operated.  Businesses are open during Boulderthon!
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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. For more information, please email Our most up to date impacts will be posted here.