The Pacific Northwest & The Columbia River Basin - extends up to the headwaters of the Columbia above Banff, east to the Continental Divide, south into northern Nevada for the southern tributaries of the Snake, and into California for the southernmost Cascades.
Included on the map: All of Washington, Oregon, and Idaho, with lots of British Columbia, Alberta, and Montana.
Scale: 1:2 million 1"= about 32 miles
