Mount Constitution, which tops out at 2,400 feet, is the highest point in the San Juan Islands. It’s located on Orcas, the largest of several hundred islands that make up the archipelago. ‘The name “Orcas” is a shortened form of Horcasitas, or Juan Vicente de Güemes Padilla Horcasitas y Aguayo, 2nd Count of Revillagigedo, the Viceroy of Mexico who …