In 1845 José de Jesús Noé was granted Rancho San Miguel, four thousand acres (16 km²) stretching from Twin Peaks into Noe and Eureka valleys. In 1854 John M. Horner purchased the ranch and laid out Horner's Addition in a grid bounded by Castro Street on the west, Valencia Street on the east, 18th Street on the north and 30th Street on the south. Eureka Valley was part of the Mission Dolores subdivision but was not developed until the 1890s and the early 1900s.