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1956 Map of Loomis

Name: 1956 Topographic Map of Loomis
Creator: U.S. Geological Survey
Published: 1967
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1967

About this map

The Similkameen River carves a deep valley through the northern Okanogan highlands in this mid-century survey, crossing the Canada United States border near Nighthawk. The landscape is a complex network of mining claims and rugged peaks, where the Great Northern railroad follows the river's path to serve the region's mineral wealth. Dozens of specific mines are documented, including the Golden Zone Mine and the Horn Silver Mine, illustrating the intense prospecting history along the slopes of Chopaka Mountain and Ellemeham Mtn.

Settlement centers like Loomis and Enterprise anchor the southern portion of the map, connected by a series of high-elevation water bodies such as Palmer Lake and Spectacle Lake. The establishment of the Sinlahekin Game Range indicates a transition toward conservation and land management in the mid-1950s, even as remote structures like the Beef Pasture Cabin persist in the backcountry. The map provides a detailed view of the drainage patterns from Toats Coulee Creek and Sinlahekin Creek that define the local topography.