Lost River (Cacapon River tributary)

Lost River
Location of the mouth of the Lost River in West Virginia
Lost River (Cacapon River tributary) (the United States)
Location
CountryUnited States
StateWest Virginia
CountyHardy County
Physical characteristics
Source 
  locationMathias
  coordinates38°48′56″N 78°52′41″W / 38.81556°N 78.87806°W / 38.81556; -78.87806
MouthCacapon River
  location
McCauley
  coordinates
39°03′49″N 78°39′16″W / 39.06361°N 78.65444°W / 39.06361; -78.65444
Length31.1 mi (50.1 km)
Discharge 
  locationMcCauley
(Oct. 1971 to Jan. 1980)
  average186 cu ft/s (5.3 m3/s)
(Oct. 1971 to Jan. 1980)

The Lost River is a 31.1-mile-long (50.1 km) river in the Appalachian Mountains of Hardy County in West Virginia's Potomac Highlands region. The Lost River is geologically the same river as the Cacapon River: it flows into an underground channel northeast of McCauley along West Virginia Route 259 at "the Sinks" and reappears near Wardensville as the Cacapon. The source of the Lost River lies south of Mathias near the West Virginia/Virginia border. Along with the Cacapon and North Rivers, the Lost River serves as one of the three main segments of the Cacapon River and its watershed.

The river is listed as impaired due to pathogens by the state of West Virginia; this is likely due to the livestock and poultry raising activities throughout the valley.

The river was named for the fact it is a losing stream.