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1958 Map of Split Rock Lake

Name: 1958 Topographic Map of Split Rock Lake
Creator: U.S. Geological Survey
Published: 1960
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1960

About this map

An Indian Burial Ground and the rugged transition from high ridges to river bottomland define this mid-century landscape along the border of Teton and Lewis and Clark Counties. The map reveals a post-frontier ranching economy in transition, where sites like Stetler Ranch, Frazier Ranch, and Carlson Ranch are marked as abandoned, contrasted by the active Morris Ranch near the Sun River.

Water management is central to the area's development, evidenced by the extensive Pishkun Canal network, an Aqueduct, and a significant Tunnel that bypasses Tunnel Lake. The eastern portion is dominated by the Pishkun National Wildlife Refuge, protecting the waters of the Pishkun Reservoir and Split Rock Lake. This 1958 field check captures the intersection of high-plains geography and early twentieth-century infrastructure, including a lone Oil Well and the prominent Black Reef formation.