United States, California, Los Angeles, Western Transverse Range; SimiHills; north of Santa Susana Road; ca. 2.3 air-miles northwest of Chatsworth Highschool, ca. 0.9 air-mile west of Topanga Blvd., ca. 0.8 air-mile east x northeast of Santa Susana Pass. T02N R17W S12 NW1/4 USGS Quadrangle: Oat Mtn. 1:24,000