The Sprinter (styled in caps as SPRINTER) is a DMU-operated light rail line operating between Oceanside and Escondido, California, United States. The service uses the pre-existing 22 miles (35 km) Escondido Branch trackage of the San Diego Northern Railroad. Station platforms were constructed for the line’s fifteen stations serving the cities of Oceanside (western terminus), Vista, San Marcos, and Escondido (eastern terminus).