
Thornburgh sits at a geographic crossroads in Northwest Colorado, where the transition from high plains to mountainous forest is etched into the landscape by the winding course of Milk Cr. This survey illustrates a region defined by complex water management and high-altitude terrain, featuring intricate systems like the Wilson Ditch and Fergusson Ditch Number 2. These human-made waterways suggest a long history of ranching and resource allocation in the high desert valleys surrounding Thornburgh Mtn.
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1910 · Danforth Hills
USGS Topo · 1:125,000
1912 · Meeker
USGS Topo · 1:62,500
1912 · Axial
USGS Topo · 1:62,500
1914 · Meeker
USGS Topo · 1:62,500
1914 · Axial
USGS Topo · 1:62,500
1915 · Monument Butte
USGS Topo · 1:62,500
1954 · Craig
USGS Topo · 1:250,000
1957 · Craig
USGS Topo · 1:250,000
1958 · Craig
USGS Topo · 1:250,000
1960 · Craig
USGS Topo · 1:250,000