Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Palomar Mountain is a mountain range in northern San Diego County, California, United States. It is most famous as being home to the Palomar Observatory and the giant Hale Telescope. It is also the location of Palomar Mountain State Park, a California state park. There are campgrounds for vacationers, as well as a campground for local school children. The park averages 70,000 visitors annually. High Point in the Palomar Mountain range is one of the highest peaks in San Diego County, at 6,140 feet (1,871 m), although it is still dwarfed by the higher 11,500 feet (3,505 m) San Bernardino Mountains a relatively-short distance north in San Bernardino County and Riverside County and the 14,500 feet (4,420 m) high Mount Whitney some 250 mi (402 km) further north.