El Camino Real (Spanish; literally The Royal Road, often translated as The King's Highway) is a 600-mile (965-kilometer) commemorative route connecting the 21 Spanish missions in California (formerly the region Alta California in the Spanish Empire), along with a number of sub-missions, four presidios, and three pueblos. Sometimes associated with Calle Real, its southern end is at Mission San Diego de Alcalá and its northern terminus is at Mission San Francisco Solano.