<Tr> <Th> Counties </Th> <Td> Los Angeles and San Bernardino </Td> </Tr> <Tr> <Th> Range coordinates </Th> <Td> 34 ° 17 ′ 20" N 117 ° 38 ′ 48" W ﻿ / ﻿ 34.28889 ° N 117.64672 ° W ﻿ / 34.28889; - 117.64672 Coordinates: 34 ° 17 ′ 20" N 117 ° 38 ′ 48" W ﻿ / ﻿ 34.28889 ° N 117.64672 ° W ﻿ / 34.28889; - 117.64672 </Td> </Tr> <P> The San Gabriel Mountains are a mountain range located in northern Los Angeles County and western San Bernardino County, California, United States . The mountain range is part of the Transverse Ranges and lies between the Los Angeles Basin and the Mojave Desert, with Interstate 5 to the west and Interstate 15 to the east . This range lies in, and is surrounded by, the Angeles National Forest, with the San Andreas Fault as the northern border of the range . </P> <P> The highest peak in the range is Mount San Antonio, commonly referred to as Mt . Baldy . Mount Wilson is another famous peak, famed for the Mount Wilson Observatory and the antenna farm that houses many of the transmitters for local media . The observatory may be visited by the public . On October 10, 2014, President Obama designated the area the San Gabriel Mountains National Monument . </P>

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