
Mount Davis anchors this portion of the Allegheny Mountains, serving as the highest point in Pennsylvania within the Negro Mountain ridge. The landscape is defined by its high-altitude plateaus and the deep incision of the Casselman River valley to the northwest. Along the river, the small settlements of Markleton and Pinkerton are linked by the CSX railroad and the Great Allegheny Passage National Scenic Trl, which follows the historic rail corridor.
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1899 · Grantsville
USGS Topo · 1:62,500
1900 · Accident
USGS Topo · 1:62,500
1904 · Grantsville
USGS Topo · 1:62,500
1921 · Meyersdale
USGS Topo · 1:62,500
1922 · Confluence
USGS Topo · 1:62,500
1931 · Confluence
USGS Topo · 1:62,500
1933 · Confluence
USGS Topo · 1:62,500
1939 · Meyersdale
USGS Topo · 1:62,500
1944 · Meyersdale
USGS Topo · 1:62,500
1946 · Grantsville
USGS Topo · 1:24,000