Columbia River
The Columbia drains an area of about . Its drainage basin covers nearly all of Idaho, large portions of British Columbia, Oregon, and Washington, ultimately all of Montana west of the Continental Divide, and small portions of Wyoming, Utah, and Nevada; the total area is similar to the size of France. Roughly of the river's length and 85 percent of its drainage basin are in the US. The Columbia is the twelfth-longest river and has the sixth-largest drainage basin in the United States. In Canada, where the Columbia flows for and drains , the river ranks 23rd in length, and the Canadian part of its basin ranks 13th in size among Canadian basins. 
The Columbia shares its name with nearby places, such as British Columbia, as well as with landforms and bodies of water.
Eastern forest-boreal transition
The ecoregion includes most of the southern Canadian Shield in Ontario and Quebec north and west of the Saint Lawrence River lowlands including the eastern shores of Lake Superior and other areas of the Great Lakes, Lake Timiskaming, the southern Laurentian Mountains, Lake Nipissing, Quebec City, the Saguenay River and parts of Georgian Bay, Greater Sudbury/North Bay, Ontario, Saguenay, Quebec, the Clay Belt and Temagami in Ontario. There is a separate section of the ecoregion in the Adirondack Mountains in upper New York State, United States. However the higher elevations of the Laurentian Mountains and the northern Appalachian Mountains in Canada constitute the Eastern Canadian forests ecoregion.