United States, California, Monterey, Fort Hunter Liggett (Training Area 2), near ford of San Antonio River on Del Venturi Road, ca. 1.7 km W of Milpitas Reservoir, ca. 4 air km SW of Coleman Reservoir dam. UTMs (NAD 27, map estimate): zone 10S, 651100 to 651200 E, 3992800 to 3992900 N