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Boulderthon: Boulder Marathon (Full, Half, 10k, 5k, Kids Run)

October 8, 2023

Boulderthon

After nearly tripling in size and selling out last year, Boulderthon has instituted a new 5,000 runner cap and is expected to sell out again. Register today!

Colorado’s Largest Fall Race Series: Run a 5k, 10k, Half, or Full, at the foothills of the Rockies, in the stunning running mecca of Boulder. Run the streets Olympians train on, then celebrate at our epic After Party in Downtown Boulder!

Boulderthon is one of the top-rated marathons in the United States: named #5 Best Half Marathon in the US by Active, as well as #1 Best in Colorado and #13 Most Beautiful Marathon in the World by HalfMarathons.Net, Boulderthon drew over 4,000 runners from all 50 states and 15 countries in 2022, nearly tripling in registration, and selling out.

Details

Date:
October 8, 2023
Event Category:
Event Tags:
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Website:
Register

Venue

Boulder, Colorado
Boulder, CO 80301 United States + Google Map

Other

Event Distance
5K, 10K, Half Marathon, Marathon
Region
West