"Spur" . . "77" . "Texas State Highway Spur 77 or Spur 77 is a spur road maintained by the Texas Department of Transportation (TxDOT) connecting the University of Texas at Austin's McDonald Observatory complex atop Mt. Fowlkes to Spur 78 16.3 miles (26.2 km) from Fort Davis. The road is 0.5 miles (0.8 km) long and is located within Jeff Davis County.Previously, the route designation belonged to a loop road in the Texas Panhandle."@en . . "769.266"^^ . "South" . . . "North" .