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 ...

An upside-down American flag attached to Boulder’s Second Flatiron, noticed the latest round of federal employee layoffs hit NOAA and NWS offices across the country, has been removed by city staff.

BOULDER, Colo. (KDVR) — A man took his “adventure cat” up the Boulder Flatirons in Colorado ... Wolff said it was pitch-black, and he was with an inexperienced climber and didn’t trust ...