[DOC] [TLE] Columbia River - Wikipedia [PAR] The river rises in the Rocky Mountains of British Columbia, Canada. It flows northwest and then south into the US state of Washington, then turns west to form most of the border between Washington and the state of Oregon before emptying into the Pacific Ocean. [DOC] [TLE] Snake River - Wikipedia [PAR] The Snake River is a major river of the greater Pacific Northwest in the United 
States. At 1,078 ... By the middle 19th century, the Oregon Trail, a pioneer trail of 
which a major ... From there, the Snake crosses into Washington and Idaho, 
receiving the ... The Snake River Plain and the gap between the Sierra Nevada 
and... [DOC] [TLE] Columbia River | river, North America | Britannica.com [PAR] Largest river flowing into the Pacific Ocean from North America. ... In addition, its 
mouth provides the first deepwater harbour north of San Francisco. ... (668,000 
square km), of which about 85 percent is in the northwestern United States. ... 
ocean as the boundary between Oregon and Washington; in this last stretch the 
river... [DOC] [TLE] Columbia River - New World Encyclopedia [PAR] Jun 6, 2013 ... The Columbia River is the largest river in the Pacific Northwest ... The river forms 
the border between Washington and Oregon for the ... forming the boundary 
between Washington to the north and Oregon to the south. ... In addition to its 
natural beauty, the gorge also provides a critical transportation corridor. [DOC] [TLE] Columbia River: Description, Creation, and Discovery - Northwest ... [PAR] Oct 31, 2008 ... The river flows north for some 200 miles (322 kilometers) and then turns ... the 
border between Oregon and Washington to the Pacific Ocean. ... acre-feet into 
the Pacific; much of its volume originates in its middle and upper reaches. ..... 
tenuous claim to the Columbia until the boundary matter finally was... [DOC] [TLE] Columbia River - The Oregon Encyclopedia [PAR] Coursing southwest through north-central Washington State, the river skirts 
massive lava ... in southeastern Washington, just miles from Oregon's northern 
boundary. ... More than 100 massive floods carved out the 3,000-foot trough 
between ... The reach of tide on the Columbia River extends from the Pacific a 
little more... [DOC] [TLE] Center for the Study of the Pacific Northwest - University of Washington [PAR] Oregon Treaty of 1846 defined the boundary between the U.S. and Canada at 
the ... and European markets by way of the Columbia River and the Pacific 
Northwest. ... much of the competition for fur in the North American Far West 
narrowed to a ... stock-raising in the Pacific Northwest and Canadian West
partly to provide... [DOC] [TLE] The State of Crayfish in the Pacific Northwest - Washington Invasive ... [PAR] matter, and detritus, and serve as an important link between ... Native crayfishes 
of the Pacific Northwest: A. Snake River pilose crayfish ... Oregon, and 
Washington, inland to the Columbia and Snake. River ... boundaries and natural 
populations, communities, and ... in the Pacific Northwest, with the intent of 
providing an. [DOC] [TLE] The Columbia - USGS Publications Warehouse - U.S. Geological ... [PAR] national parks and historical places, and providing for the enjoy- ment of life 
through ... The Columbia enters the Pacific Ocean near Astoria ... The river flows 
northwest 218 miles; then south for ... boundary between Washington and 
Oregon. [DOC] [TLE] Hells Canyon - US Forest Service [PAR] Hells Canyon, North America's deepest river gorge, encompasses a vast and 
remote ... the Snake River between Hells Canyon Dam and the Oregon-
Washington boundary. ... in an 1895 edition of McCurdy's Marine History of the 
Pacific Northwest. ... Wilderness over much of its length, but none of the corridor 
is wilderness. [DOC] [TLE] Geology of the Grand Coulee Dam Area - Bureau of Reclamation [PAR] Grand Coulee Dam is near the boundary between the Okanogan Highlands to ... 
The rock types under the Columbia River basalt have not been ... than 100,000 
square miles in presentday Washington, Idaho and Oregon, ... in the Pacific 
Northwest and beyond enjoy many benefits of eastern Washington's unique 
geology. [DOC] [TLE] You

Question: This river of the Pacific Northwest provides much of the boundary between Washington & Oregon
Answer: the Columbia