Bolinas (bo-leen-ahs), uninc. town (1990 pop. 1,098), Marin co., W Calif., suburb 15 mi/24 km NW of downtown San Francisco and 10 mi/16 km WSW of San Rafael, on Bolinas Bay at entrance to Bolinas Lagoon (c.3.5 mi/5.6 km long); lagoon and bay lie within NW extension of San Andreas Fault; 37°55'N 122°42'W. Resort; fishing. Coast guard lifesaving station here. At SE end of Point Reyes Natl. Seashore