These jaw-dropping rock walls flanking Green Mountain have become the symbol of the city, with many Boulder businesses ... Flatirons from one of the area's hiking trails – recent visitors ...

While hikers can travel Rainbow Falls Trail for its full 6.7 miles to Mount Le Conte, most opt for the 5.6-mile out-and-back hike to its namesake ... Visitors pass through boulder fields, cross ...

A climber from Golden died Sunday afternoon after falling in the Riviera climbing area west of Boulder.