Lone Tree City Center station is a light rail station in Lone Tree, Colorado, part of the RTD system in Denver. It is served by three lines: the E Line to Union Station, the F Line to Downtown Denver, and the R Line to Aurora. The station consists of two side platforms located adjacent to the interchange of Interstate 25 and RidgeGate Parkway. It also has a 1,300-stall parking garage and bicycle facilities. Construction on the 2.3-mile (3.7 km) extension to Lone Tree began in 2016 and cost $223 million, encompassing three stations—Lone Tree City Center, RidgeGate, and Sky Ridge. It opened on May 17, 2019.