community calendar






See what's happening around town. You can even submit your own events!


submit your event



Boulderthon: Boulder Marathon & Half Marathon 2023

Boulder 1420 Pearl St, Boulder, CO, United States

Colorado's Largest Fall Race Series: Registration for Boulderthon 2023 is now open! 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 downtown! Boulderthon is one of the top-rated marathons in the United […]