The San Miguel Sheriff’s Office is celebrating five years since an iconic social media post – and shouting out its author – on Monday.

"In Boulder, the rainfall record for September ... The Colorado resident who took the following pictures told Business Insider: "It's so crazy here — just about every other street is closed ...

Boulder Falls lures many locals to Boulder Canyon, especially during hot summer days. “Romantic couples and families love to take photos at waterfalls. Boulder’s 70-foot waterfall is framed by ...

These jaw-dropping rock walls flanking Green Mountain have become the symbol of the city, with many Boulder businesses sporting their image as a logo. Flatirons One through Five are the most ...

Watch a video of the race and the ceremony. Because of windy conditions in the area, the traditional parachute jump into the stadium was canceled. Photos by Justin Hein and Ichigo Takikawa (CU Boulder ...