Fages set out north from San Diego again in 1772, establishing another new trail, departing from the earlier trail near today's Castaic Junction to continue north over Tejon Pass into the San Joaquin Valley. The expedition was accompanied again by friar Juan Crespí, who kept a daily journal. Returning to his earlier trail at the eastern shore of San Francisco Bay, Fages pushed on past his previous stopping point, seeing for himself the entrance to San Francisco Bay, now known as the Golden Gate. The party continued north along San Pablo Bay but was prevented from going farther north by the Carquinez Strait. Following the bay around to the east, Fages' group climbed the slopes of Mount Diablo and became the first Europeans to see the Sacramento-San Joaquin River Delta, the Central Valley of California and the Sierra Nevada mountain range. Seeing that it was impossible to cross the wide river without boats, the party looped around to return to San Jose through today's Contra Costa County (roughly following today's I-680 highway).