The National Geographic Trails Illustrated layer now includes full coverage of the Bob Marshall Wilderness in northwest Montana.
The Bob Marshall Wilderness Area, nicknamed “The Bob”, ranks as the fifth largest wilderness area in the continental U.S. and covers over 1 million areas of pristine alpine lakes, waterfalls, and ionic peaks like the Chinese Wall section of the Continental Divide.  The Bob also includes over 84 miles of the Continental Divide Trail (CDT).
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