La Cienega — Mud Springs — San Dimas.
Los Angeles - San Bernardino - Sonora Road stage station & artesian aquifer, a place favored by the Gabrielino Tongva Indians. Near here in 1774 and 1776 Juan Bautisa de Anza, trailblazer — colonizer, and his followers passed on their way from Sonora, Mexico to Monterey, California. And on November 12, 1826 Jedediah Strong Smith, trader — trapper — pathfinder, one of the most heroic pioneers of the nation, and the first non-native American to make his way overland to California, camped with his band of trappers near this spot on his way to the Mission San Gabriel.
First erected by the Pomona Valley Historical Society and the Service Organizations of San Dimas, dedicated in 1939. Refurbished by the San Dimas Women's Club in 1954; the San Dimas Historical Society in 1995. Relocated by the San Dimas Historical Society in 2019.