December Races in Boulder County, CO

Clear your browsing data in order to view the new map.
Saturday Sunday Monday Tuesday Wednesday Thursday Friday Multiple
Sat Sun Mon Tue Wed Thu Fri Multiple
Hide Map
Upcoming All Dates
Specify Date Range
Start Date
End Date
Classic Multisport Variety Event Category

Event Category

Click Here to find out what Classic, Multisport, and Variety mean.

To narrow your search by a distance or event type, you will need to select Classic, Multisport, or Variety first.

All Colorado
  • select a city
  • to enable this menu
Name Open Date Close Date
With Virtual Option
1. Colorado Brewery Running Series - Left Hand Brewing
2. South Boulder Creek parkrun
3. ColderBOLDER
4. Superior Stocking Run
5. South Boulder Creek parkrun
6. South Boulder Creek parkrun
7. Super Santa 5K
8. South Boulder Creek parkrun
9. South Boulder Creek parkrun

For the love of all that Is good And moisture wicking...

Though we Try To be accurate And On top Of things... Race details can change When we aren't lookin. And once in a while we simply make a mistake.

ALWAYS visit the race's website for the most complete and accurate race information.