Castle Mountains National Monument
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National monument in San Bernardino County, California
Castle Mountains National Monument is a U.S. National Monument located in the eastern Mojave Desert and northeastern San Bernardino County, in the state of California.
The park protects 20,920 acres, located between the interstates I−15 and I−40, and northwest of the Colorado River.
Address: Barstow, CA 92311
Hours: Open 24 hours
Phone: (760) 252-6100