
Blanchardville sits at a critical junction of the Pecatonica River and the Illinois Central Railroad, serving as a central hub for this portion of the Driftless Area during the early 1960s. The landscape is defined by its dendritic drainage patterns, with numerous valleys like Star Valley and Jeglum Valley carved between high ridges. A significant man-made addition to the natural terrain is Yellowstone Lake, surrounded by the Yellowstone Conservation Area, which transformed the local hydrology of the Yellowstone River.
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1902 · Mineral Point
USGS Topo · 1:125,000
1905 · Richland Center
USGS Topo · 1:125,000
1907 · Cross Plains
USGS Topo · 1:62,500
1909 · Cross Plains
USGS Topo · 1:62,500
1920 · Blue Mounds
USGS Topo · 1:62,500
1920 · Monroe
USGS Topo · 1:62,500
1922 · Blue Mounds
USGS Topo · 1:62,500
1922 · Monroe
USGS Topo · 1:62,500
1923 · Blanchardville
USGS Topo · 1:62,500
1923 · New Glarus
USGS Topo · 1:62,500