The first European settlement on the West Coast of the present-day United States was the San Diego Presidio, a military outpost of Spanish California, founded by Gaspar de Portolà in 1769. Mission San Diego de Alcalá was founded by Father Junípero Serra the same year. The Presidio and Mission were originally built on a bluff above the San Diego River, Presidio Hill, which is now the site of the city-owned Presidio Park and which is immediately adjacent to Old Town State Historic Park.