The Orange Line is an 18.0-mile (29.0 km) light rail line in the San Diego Trolley system, operated by San Diego Trolley, Inc. an operating division of the San Diego Metropolitan Transit System. The route connects Downtown San Diego with the cities of Lemon Grove, La Mesa, and El Cajon. The Orange Line has the lowest ridership of the San Diego Trolley's three regular lines, transporting 10,896,289 riders during FY 2014 according to the MTS. It is one of four lines in the Trolley system, the others include the Blue, Green and Silver lines.