The Lewis and Clark Range dominates this portion of the northern Rockies, where the border between the Flathead National Forest and Lewis & Clark National Forest follows the high continental divide. This mountainous landscape is defined by its drainage systems, with Basin Cr and Park Cr carving deep valleys between prominent massifs like Pentagon Mtn and Clack Mtn. The map reveals a high-altitude wilderness at the turn of the 21st century, punctuated by clear alpine water bodies such as Dean Lake and Lake Levale. Notable peaks like Moonlight Peak and Table Mtn anchor the southern reaches of the survey, while Switchback Pass indicates the traditional routes used to traverse this complex terrain. The presence of the Flathead Co and Lewis and Clark Co line underscores how political boundaries often align with these formidable natural ridges.
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This is the sole edition of this map. No revisions or reprints were ever made.
1903 · Saypo
USGS Topo · 1:125,000
1913 · Marias Pass
USGS Topo · 1:125,000
1914 · Heart Butte
USGS Topo · 1:125,000
1918 · Heart Butte
USGS Topo · 1:125,000
1936 · Silvertip
USGS Topo · 1:96,000
1942 · Silvertip
USGS Topo · 1:125,000
1955 · Choteau
USGS Topo · 1:250,000
1957 · Choteau
USGS Topo · 1:250,000
1958 · Choteau
USGS Topo · 1:250,000
1958 · Gable Peaks
USGS Topo · 1:24,000