United States, California, San Bernardino, Castle Mountains; BLM lands; N. end of range, along BLM Rd# 124, 1.3 mi. NE of Jct Hart Mine Rd. (or Walking Box Ranch Rd), 11 mi. SE of Hart Mine Rd, 9.1 mi. E. of Barnwell (Jct Ivanpah Rd).; 7.5' Hart Peak