Sonoma-Marin Area Rail Transit

Sonoma–Marin Area Rail Transit (SMART) is a commuter rail service and bicycle–pedestrian pathway project in Sonoma and Marin counties of the U.S. state of California. When fully built, the system will span a 70-mile (110 km) corridor between Cloverdale in northern Sonoma County and Larkspur Landing in Marin County. In 2025, SMART recorded an annual ridership of 1,329,300, averaging about 4,400 weekday passengers as of the fourth quarter of 2025.