Road · Half Marathon
Boulderthon Half Marathon (Spring)
Date to be announced
Boulder, CO
Boulderthon Half Marathon (Spring) is a road race of 13.1 miles (21.1 km) in Boulder, Colorado. Its next date hasn't been announced. Registration is open to all. The field is about 3,600 runners.
There are 40 other upcoming races up to a half marathon in Colorado.
13.1miDistance
3,600runnersField
Questions about Boulderthon Half Marathon (Spring)
Where is Boulderthon Half Marathon (Spring)?
Boulderthon Half Marathon (Spring) is held in Boulder, Colorado.
How long is Boulderthon Half Marathon (Spring)?
Boulderthon Half Marathon (Spring) is 13.1 miles (21.1 km).
How do you get into Boulderthon Half Marathon (Spring)?
Boulderthon Half Marathon (Spring) has open registration.
What other races up to a half marathon are there in Colorado?
Other upcoming races up to a half marathon in Colorado include Estes Epic (September 26, 2026), WILD Wahatoya Runs (September 26, 2026) and Boulderthon Half Marathon (September 27, 2026).
Other races in Colorado
- Estes Epic Half Marathon · Sep 26, 2026
- WILD Wahatoya Runs 8 Mile · Sep 26, 2026
- Boulderthon Half Marathon Half Marathon · Sep 27, 2026
- Above the Clouds Ultra 10K · Oct 3, 2026
- Sage Burner Trail Race 15K · Oct 3, 2026
More like it
Updated