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', 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. The observatory features a 0.75 m (30 in) Ritchey-Chrétien telescope built by Boller and Chivens. Currently, the observatory utilizes an Andor thermo-electrically cooled CCD camera in conjunction with the primary telescope. Initially used for professional and graduate research, the observatory is now used mostly by undergraduate students for instruction and research. For a brief time there was talk of stopping funding for MRO as the University of Washington Astronomy Department focus on the Apache Point Observatory, but funding did continue and MRO is still in use.