
The international boundary with Canada defines the northern edge of this remote high-altitude corridor in Whatcom County. This 2023 survey documents the hydrographic network of the region as it exists today, focusing on the intricate drainage systems that flow through this northern borderland. While the map is sparse regarding human settlements or developed infrastructure, it precisely records the natural water features and topographical drainage patterns that have shaped the wilderness character of this area since the boundary was established. This data serves as a modern record of the unchanged mountain terrain along the northernmost limit of Washington.
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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