Lone Tree is a home rule municipality located in northern Douglas County, Colorado, United States. The population was 14,253 at the 2020 census, and was estimated to be 14,061 in 2024.
The R Line or Aurora Line/I-225 Rail is a Regional Transportation District light rail line that serves stations in Aurora, Denver, Greenwood Village, Centennial and Lone Tree. Opening on February 24,
R Line tracks at the intersection of E Exposition Ave and S Sable Blvd prior to operation