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United States landscape

Boulder

United States

2 spots 1 guide

About Boulder

In geology, a boulder is a rock fragment with size greater than 25.6 cm (10.1 in) in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive. In common usage, a boulder is too large for a person to move. Smaller boulders are usually just called rocks or stones.

Based on 2 spots from 1 travel guide

What to Expect in Boulder

Video Guides

WE LIVED IN A $650,000 EARTHROAMER (full tour) 21:34

Top 2 Nature Spots in Boulder You Can't Miss

Kara and Nate
Kara and Nate
2 spots 15.2M

Top Picks in Boulder