The observatory of the University of Texas, on the adjacent peaks of Mount Locke (altitude 2070 m) and Mount Fowlkes (altitude 1980 m), near Fort Davis in western Texas. It was founded in 1932 and is named after William Johnson McDonald (1844–1926), a banker who gave money for its construction. Its largest instruments are the 10-m Hobby–Eberly Telescope on Mount Fowlkes; the 2.72 m Harlan J. Smith reflector opened in 1968 on Mount Locke; the 2.1 m Otto Struve reflector, opened in 1939 on Mount Locke; and a 0.76 m reflector opened in 1970 on Mount Locke. It is also the site of the 1.2 m MONET/North robotic telescope owned by the University of Göttingen, Germany, opened in 2006 on Mount Locke.

http://www.as.utexas.edu/mcdonald/mcdonald.html Official observatory website.