The first American explorers in the Owens Valley of Eastern California included the famous mountain men Jedediah Smith in 1826 and Joseph Walker in 1834. This remote area of California had never been explored by the Spanish and even though it was shown as Mexican territory on early maps, the Eastern Sierra region remained unvisited by them. Present day Walker Lake in western Nevada, the Walker River on the California/Nevada border and Walker Pass in the southern Sierra were named for their discoverer, Joseph Walker.