
Lycoming Creek carves a deep valley through the high ridges of northern Pennsylvania, serving as a vital corridor for the Pennsylvania RR and the highway now known as U. S. Route 15. In the valley bottom, the settlement of Trout Run sits at the junction of mountain roads, while higher elevations like Cogan House and Steam Valley anchor remote upland farming communities. The map reveals a landscape heavily dotted with one-room schoolhouses, such as Stony Gap School and Falls Factory School, reflecting the era's localized educational system. Toward the southern edge, the terrain levels as it approaches the Susquehanna West Branch, where the legacy of the Pennsylvania Canal remains visible near Williamsport. This industrial and transport history is contrasted by the numerous family-named hollows and ridges, such as Bartell Hollow and Horner Hollow, which provide significant clues for local family history research.
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1921 · Williamsport
USGS Topo · 1:48,000
1921 · Trout Run
USGS Topo · 1:62,500
1921 · Lock Haven
USGS Topo · 1:62,500
1923 · Lock Haven
USGS Topo · 1:62,500
1923 · Trout Run
USGS Topo · 1:62,500
1923 · Williamsport
USGS Topo · 1:62,500
1924 · Milton
USGS Topo · 1:62,500
1925 · Blossburg
USGS Topo · 1:62,500
1927 · Blossburg
USGS Topo · 1:62,500
1930 · Warrensville
USGS Topo · 1:62,500