Course
A looped course through Louisville, Colorado, mixing about nine miles of flat crushed gravel path with road sections and taking in views of the Flatirons. Ten water stations and five portable toilets are spaced around the route, with iced towels at the finish.
Key dates
- !RegistrationOpen now
- ★Race daySun 6 Jun 2027
About
The Colorado 13er is THE event where the best parts of trail running and road racing combine to create a truly enjoyable, kind-to-your-body, well-supported 13.1 race! Seasoned runners and first-timers alike appreciate the excellent communication from the 13er race crew who make this event accessible for athletes of all levels.
Save Colorado 13er (Half Marathon/10k/5k) to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
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A confirmed date shows its day; a provisional one shows only its month, because we won't claim a day we don't have. This page is rebuilt every night from the RunCalendar catalogue.