The City and County of Denver is the capital and the most populous city of the U.S. state of Colorado. Denver is located in the South Platte River Valley on the High Plains just east of the Front Range of the Southern Rocky Mountains. The Denver downtown district is located immediately east of the confluence of Cherry Creek with the South Platte River, approximately 15 miles east of the foothills of the Rocky Mountains. Denver is nicknamed The Mile-High City because its official elevation is exactly one mile above sea level. Denver apartments for rent comparison page shows most up to date rent information on Denver apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.