The city of boulder is located on the slopes of the Rocky mountains, 45 miles from Denver, at altitude of 1655 meters above sea level. The administrative center of the eponymous district (eng. Boulder County). Boulder is the 11th populous city state Colorado. In the city, thanks to its high altitude and dry mountain climate, there are nearly 300 days of sunshine a year, making a neighborhood of boulder, a perfect training base for athletics, as well as some winter sports.