Sideling Hill

Sideling Hill
Interstate 68 road cut in Sideling Hill in western Maryland
Highest point
Elevation	2,310 ft (700 m)
Prominence	280
Coordinates	40.0090, -78.1295 at Fisher Point
Geography
Location	West Virginia, Maryland, and Pennsylvania, U.S.
Parent range	Ridge-and-Valley province, Appalachian Mountains
Topo map	USGS Wells Tannery

Sideling Hill (also Side Long Hill) is a long, steep, narrow mountain ridge in the Ridge-and-Valley (or Allegheny Mountains) physiographic province of the Appalachian Mountains, located in Washington County in western Maryland and adjacent West Virginia and Pennsylvania, USA. The highest point on the ridge is Fisher Point, at 2,310 feet (700 m) in Fulton County, Pennsylvania.

Sideling Hill is a syncline mountain, in a region of downward-folded (synclinal) rock strata between two upfolded anticlines. The ridge is capped by an erosion-resistant conglomerate and sandstone of Mississippian (early Carboniferous) geologic age, the Purslane Sandstone of the Pocono Formation. The ridge's slopes are formed of much more easily eroded kinds of rock, including the Devonian-Mississippian Rockwell Formation, with long, narrow valleys paralleling the ridge on either side.

Most of the crest of Sideling Hill is forested, primarily with various deciduous-leaved tree species such as oaks (Quercus) and hickories (Carya), along with occasional evergreen pines (Pinus).