In 1774, Spanish explorer Juan Bautista de Anza established an overland route from Arizona to California, with part of the trail passing through present day Upland on the way to the San Gabriel Mission. Anza's route went through Yuma, the San Gorgonio Pass and through the San Bernardino Valley. In 1775, Anza led a second expedition consisting of more than 240 people on a journey of over two thousand miles to the San Francisco Bay. En route, the expedition reached the San Gabriel Mission on January 4, 1776. The expedition reached the San Francisco Bay on June 27, 1776, where Anza founded the present day city of San Francisco. Five years later, in 1781, Spanish settlers followed Anza's route to found the city of Los Angeles a few miles west of the San Gabriel Mission.