The international border of Canada defines the southern extent of this high-altitude landscape in the northern reaches of the Okanogan-Similkameen region. Located just across the United States boundary, this area is characterized by a dense network of high-country drainage systems that flow through a largely undeveloped terrain. The map documents the intricate hydrography of the region as it was recorded between 2006 and 2019, reflecting the natural topography and watershed patterns prior to any significant modern infrastructure or settlement development in this specific quadrangle.
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This is the sole edition of this map. No revisions or reprints were ever made.
1906 · Chopaka
USGS Topo · 1:125,000
1954 · Okanogan
USGS Topo · 1:250,000
1956 · Loomis
USGS Topo · 1:62,500
1956 · Horseshoe Basin
USGS Topo · 1:62,500
1958 · Okanogan
USGS Topo · 1:250,000
1981 · Horseshoe Basin
USGS Topo · 1:24,000
1981 · Hurley Peak
USGS Topo · 1:24,000
1981 · Nighthawk
USGS Topo · 1:24,000
1984 · Oroville
USGS Topo · 1:100,000
2001 · Hurley Peak
USGS Topo · 1:24,000