Wilson, Mount, peak, 5,710 ft (1,740 m) high, S Calif., in the San Gabriel Mts., NE of Pasadena. It is the site of Mt. Wilson Observatory (est. 1904), one of the Hale Observatories. A 100-in. (254-cm) reflecting telescope there, no longer in use, was once the world's largest.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.
See more Encyclopedia articles on: U.S. Physical Geography