Isla Todos Santos is a pair of islands about 19.3 km (12.0 mi) off Ensenada, Baja California, at 31°47′59″N 116°47′20″W best known for surfing. Access is only by boat, which can be rented in Ensenada, or La Bufadora.^[1] The waves off the smallest island are among the biggest in North America. There are no facilities on the islands except for two lighthouses and a fish farm operation.^[2]

The islands are (or were) home to Aimophila ruficeps sanctorum, an endemic subspecies of the Rufous-crowned sparrow, which is probably extinct.^[3] It was previously home to Anthony's woodrat, which is now extinct.^[4] It is home to a critically endangered subspecies, the Todos Santos Island Kingsnake, of the California mountain kingsnake.^[5] The type species of the fish genus Bajacalifornia, Bajacalifornia burragei, was discovered during the USS Albatross deep sea expedition off the coast of Todos Santos Bay in 1911.^{[citation needed]}