May Half Marathons within 50 miles of Boulder, CO

Show Map
Upcoming All Dates
Specify Date Range
Start Date
End Date
Specify Distance Range
From
Unit
To
Unit
All Colorado
Name Open Date Close Date
With Virtual Option
1. Colorado Marathon
2. Carbon Valley Half Marathon
3. Boulder Mothers Day Run
4. Denver Colfax Marathon

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.