Welcome to San Bruno
San Bruno is located between South San Francisco and Millbrae, near San Francisco International Airport and about 12 miles south of downtown San Francisco. The city has a total area of 5.5 square miles of all of its land. The city spreads from the mostly flat lowlands near San Francisco Bay into the foothills of the Santa Cruz Mountains.
Portions of Mills Park, Crestmoor, and Rollingwood are very hilly and feature some canyons and ravines. Creeks, many of them now in culverts, flow from springs in the hills toward San Francisco Bay. Just west of Skyline Boulevard in San Andreas Lake, outside the city limits, which gave its name to the famous San Andreas Fault in 1895. The lake is actually one of several reservoirs used by the San Francisco Water Department, providing water to San Francisco and some communities in San Mateo County, including San Bruno west of I-280.