Rangers have found the body believed to be that of missing University of Colorado Boulder student Megan Trussell, 18, in ...

The Boulder Mountain Tour celebrates its 52nd year this weekend, featuring skate skiing's elite and skiers of all levels in Sun Valley, Idaho.

While still packing cardiovascular benefits, riding an e-bike can help tame grueling challenges like this 34-mile scenic ...

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 ...

If you're looking for a hike the whole family can enjoy, aim for the top of Flagstaff Mountain. Rising out of Boulder Mountain Park, Flagstaff Mountain sits about 5 miles southwest of the city.

Six decades of river data in Alaska highlight the cumulative and consequential impacts of climate change for local communities and ecosystems in the Arctic. Through the Niwot Ridge Long Term ...