
Canada defines the northern edge of this high-latitude terrain in Whatcom County, where the landscape is characterized by a dense network of glacial drainage. The area is defined by a series of steep, branching headwaters that feed into larger north-flowing systems. While no permanent settlements or road networks are noted on this specific sheet, the intricate hydrography recorded by the National Hydrography Dataset reflects a complex alpine watershed. This 2023 survey emphasizes the physical geography of the international boundary line, providing a precise record of the stream channels and natural contours that shape this part of the North Cascades region.
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This is the sole edition of this map. No revisions or reprints were ever made.
1953 · Mt Challenger
USGS Topo · 1:62,500
1955 · Concrete
USGS Topo · 1:250,000
1958 · Concrete
USGS Topo · 1:250,000
1962 · Concrete
USGS Topo · 1:250,000
1969 · Mt Spickard
USGS Topo · 1:24,000
1979 · Mt. Baker
USGS Topo · 1:100,000
1989 · Copper Mountain
USGS Topo · 1:24,000
1989 · Mt Redoubt
USGS Topo · 1:24,000
2011 · Mount Spickard
USGS Topo · 1:24,000
2011 · Copper Mountain
USGS Topo · 1:24,000