The Owlshead Mountains are located at the southern end of Death Valley National Park near the border of the Fort Irwin Military Reservation in eastern California, USA. The range lies north of the Granite Mountains and northwest of the Avawatz Mountains. The mean annual precipitation in the range is five inches or less. The Owlshead Mountains are arranged in a semi-circular pattern. Death Valley National Park is a mostly arid National Park located east of the Sierra Nevada mountain range in Inyo County, California, USA with a small section extending into Nevada. ... Fort Irwin Military Reservation, located in Fort Irwin, California, U.S., this military facility is used for live-fire training of brigade-sized forces. ... State nickname: The Golden State Official languages English Capital Sacramento Largest city Los Angeles Governor Arnold Schwarzenegger (R) Senators Dianne Feinstein (D) Barbara Boxer (D) Area  - Total  - % water Ranked 3rd 410,000 km² 4. ... The Granite Mountains is a small mountain range in San Bernadino County, California, located at the edge of the Mojave Desert. ... The Avawatz Mountains are located in San Bernardino County in the Mojave Desert of California. ...