With its proximity to the Rocky Mountains, Boulder has plenty of landscapes to explore. The city has hiking, rock climbing, and mountain biking for outdoor enthusiasts at all levels. Nearby, the Flatirons provide a stunning backdrop for these activities, attracting adventure seekers from all over.

Moving to Boulder? This vibrant Colorado city is one of the best places to live in the U.S.—with a health-focused culture, state-of-the-art educational facilities, and tons of outdoor recreation hot spots in the area's vast mountain ranges and open green spaces.

On February 10, 1859, the group of 60 prospectors established the Boulder City Town Company, named for the large number of boulders they found in nearby streams.

Boulder altitude sits at 5,318 feet high above sea level. That's slightly higher than Denver's altitude and higher than most other cities in the front range of Colorado. With such high Boulder altitude, you run the risk of altitude sickness, especially if visiting from sea level.