Manastash Ridge Observatory

The Manastash Ridge Observatory (MRO) is an astronomical observatory built in 1972 by the University of Washington. It is located in a remote area approximately 14 kilometers (8.7 mi) west of Ellensburg, Washington, at an altitude of 3930' (1198 m), a longitude of 120.7278 degrees West, and a latitude of +46.9528 degrees, and can be reached by dirt roads from Ellensburg or Selah.