The international border between Canada/United States of America defines the southern edge of this remote wilderness area within the Cascade Range. Published by the U.S. Geological Survey in coordination with the BLM and FWS National Wetlands Inventory, this survey provides a topographic record of the drainage patterns and high-elevation hydrology in this transboundary landscape. The terrain is defined by a dense network of mountain streams and headwaters, recorded through the National Hydrography Dataset and National Elevation Dataset. This map serves as a primary source for understanding the physical geography of the high Cascades at the edge of British Columbia and Washington just before the turn of the decade.
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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 · Frosty Creek
USGS Topo · 1:24,000
1969 · Tatoosh Buttes
USGS Topo · 1:24,000
2002 · Tatoosh Buttes
USGS Topo · 1:24,000
2002 · Frosty Creek
USGS Topo · 1:24,000
2002 · Castle Peak
USGS Topo · 1:24,000
2011 · Tatoosh Buttes
USGS Topo · 1:24,000