Monterey Bay is a bay of the Pacific Ocean, on the coast of California, south of San Francisco. The roughly semicircular bay is ringed by a segment of California State Route 1 which connects Santa Cruz at the north end to Monterey at the south end. Monterey Bay is home to many species of marine mammals, including sea otters, harbor seals, and bottlenose dolphins; as well as being on the migratory path of Gray and Humpback Whales and a breeding site for elephant seals.