ISLA SAN MARTIN, Baja California, Mexico was named in 1775 by Juan Francisco de la Bodega y Quadra (1743-1794), a Spanish naval officer. Located just 5 km off the Baja California Pacific coastline west of San Quintin, the island falls under the municipality of Ensenada. It is uninhabited, save for temporary fish camps.
This small extinct volcano, which rises 410 feet above sea level, is home to a diverse ecosystem. Hassler's Cove is a refuge for overnight shelter from Pacific storms and swells. It is also home to a harbor seal colony and six species of reptiles. The endemic Isla San Martin woodrat was brought to extinction by feral cats in the 1950s.
The island has a private fishing concession from the Mexican government and access to the island is by permission only.