18th/California and 18th/Stout are light rail stations on RTD's rail transit system in Denver, Colorado. These stations have one track each, and are one city block apart. 18th/California is served only by northbound trains and 18th/Stout is served only by southbound trains. After serving 18th/California, F and H Line trains turn around at 19th Street to serve 18th/Stout, while D Line trains continue to 30th/Downing via Welton Street before turning back to rejoin the main line. During rush hours, one D Line train every 30 minutes loop without going up to 30th/Downing in addition to the two every 15 minutes that do.