Salt Flat is a ghost town in northeastern Hudspeth County, Texas, United States.

[3] The headquarters of the nearby Guadalupe Mountains National Park uses this ZIP Code, although it is located closer to Pine Springs, which has no post office.

The playa occupies the north-south oriented Salt Basin Grabben, which lies between the Guadalupe and Delaware Mountains on the east and the Sierra Diablo and Diablo Plateau on the west.

The playa was originally a lake during the late Pleistocene epoch, but drying of the climate since then has left a salt pan.

Capillary evaporation in the dry, hot weather pulls brine upwards and evaporite (gypsum, halite) and carbonate (calcite, dolomite) minerals precipitate.