Boulder

Boulder is a city at the foothills of the Rocky Mountains, in northern Colorado. To the west, the trail-lined Flatirons are craggy rock formations overlooking the city.

Upcoming local events

June 6, 2027
Colorado 13er
5K
Half Marathon
10K

Nearby events to consider

Colorado Springs
February 6, 2027
Stories Trail Runs
Fruita
April 8, 2027
Desert Rats Trail Running Festival
Bellvue
April 11, 2027
NoCo Urban Ultra & Relay
Colorado Springs
April 17, 2027
Rattler Trail Races
Colorado Springs
May 8, 2027
Valkyrie Trail Race
May 15, 2027
Endure Trail Runs
Eaton
June 5, 2027
Weld Your Mettle Running Festival
Granby
June 12, 2027
Summits Trail Runs

Further reads

Training

Try a 50K Ultramarathon This Summer

May 1, 2025
/
Susan Lieto
Adventures

10 Lessons Learned Living In A Van

Mar 6, 2018
/
Paul Lieto
Age Happily

What Are You Most Living For?

Apr 26, 2018
/
Paul Lieto
Essays

You Smell Good Dirty

May 29, 2018
/
Paul Lieto

Want to trail further?

Get in touch
Get in touch