 The trolley was begun in 1907 by the Denver and Interurban Railroad, which had the intention of connecting the Front Range of Colorado.It was closed in 1951 after ceasing to be profitable.In 1983–84, a portion of the Mountain Avenue line and one of the original trolley cars, Car 21, were restored as a heritage trolley service, under the same name used by the original system, the Fort Collins Municipal Railway.