The ecoregion covers an area of 4,693 km². The islands are mountainous and volcanic in origin. Teide on Tenerife reaches 3,718 m, Roque de los Muchachos on La Palma 2,426 m, Morro de la Agujereada on Gran Canaria 1,956 m, Pico de Malpaso on El Hierro 1,501 m, and Garajonay on La Gomera 1,487 m.