Hydrological patterns and drainage systems dominate this 2017 study area along the international boundary. The landscape is defined by the northernmost extent of the North Cascades, where numerous unnamed stream branches converge near the Canada border. The map focuses on the complex drainage networks of this wilderness region, illustrating the intricate web of headwaters and mountain tributaries that flow toward the Skagit River watershed. This survey captures the state of these natural water systems just after the mid-2010s, providing a baseline for understanding the regional topography and the division between Washington and British Columbia.
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This is the sole edition of this map. No revisions or reprints were ever made.
1920 · Slate Pass
USGS Topo · 1:125,000
1955 · Concrete
USGS Topo · 1:250,000
1958 · Concrete
USGS Topo · 1:250,000
1962 · Concrete
USGS Topo · 1:250,000
1969 · Skagit Peak
USGS Topo · 1:24,000
1969 · Hozomeen Mtn
USGS Topo · 1:24,000
1969 · Mt Spickard
USGS Topo · 1:24,000
1979 · Mt. Baker
USGS Topo · 1:100,000
2002 · Hozomeen Mountain
USGS Topo · 1:24,000
2002 · Skagit Peak
USGS Topo · 1:24,000