Sports
Boulderthon Marathon
Colorado's largest fall marathon with multiple race distances (marathon, half marathon, 10K, 5K, kids run). High attendance event with downtown start and finish at Pearl Street Mall.
- When
- Sep 27, 2026
- Where
- Boulder, CO
- Est. attendance
- 5000
- Organizer
- Boulderthon
About this event
Colorado's largest fall marathon with multiple race distances (marathon, half marathon, 10K, 5K, kids run). High attendance event with downtown start and finish at Pearl Street Mall.
View original listing on boulderthon.org →Track record & vendor details
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