The Castle Mountains are located south and east of the New York Mountains in California and west of Cal-Nev-Ari, Nevada, USA. The range lies at the northeastern end of San Bernardino County's Lanfair Valley, and reaches an elevation of 5,543 feet above sea level at Hart Peak. The mountains lie in a southwest-northeasterly direction in both states, although most of the range is in California. The Piute Range lies to the southeast.

References

• California Road and Recreation Atlas, 2005, pg. 98