San Clemente Island is one of the eight islands in the Channel Islands archipelago off the coast of California. It is the southernmost island in the group and covers about 56 square miles. The island is primarily owned by the U.S. Navy and is used for military training and testing. The island features rugged terrain, with steep cliffs and sandy beaches. It is home to various wildlife, including the endangered San Clemente Island goat and several bird species. Access to the island is limited, but it offers opportunities for hiking, camping, and observing marine life in the surrounding waters.