Geography

The Pacific Northwest is a diverse geographic region, dominated by several mountain ranges, including the Coast Mountains, the Cascade Range, the Olympic Mountains, the Columbia Mountains, and the Rocky Mountains. The highest peak in the Pacific Northwest is Mount Rainier, in the Washington Cascades, at 14,410 feet (4,392 m). Immediately inland from the Cascade Range are broad, generally dry plateaus. In the US, this region is known as the Columbia Plateau, while in British Columbia it is the Interior Plateau, also called the Fraser Plateau. The Columbia Plateau was the scene of massive ice-age floods, and as a consequence, there are many coulees, canyons, and the Channeled Scablands. Much of the plateau, especially in eastern Washington, is irrigated farmland. The Columbia River cuts a deep and wide gorge around the rim of the Columbia Plateau and through the Cascade Range on its way to the Pacific Ocean.
Because many areas have plentiful rainfall and mild summers, the Pacific Northwest has some of North America's most lush and extensive forests, which are extensively populated with Coast Douglas fir trees, the second tallest growing evergreen conifer on earth. The region also contains specimens of the tallest trees on earth, the coast redwoods, in southwestern Oregon, but the largest of these trees are located just south of the California border in northwestern California. Coastal forests in some areas are classified as temperate rain forest.
Coastal features are defined by the interaction with the Pacific and the North American continent. The coastline of the Pacific Northwest is dotted by numerous fjords, bays, islands, and mountains. Some of these features include the Oregon Coast, Burrard Inlet, Puget Sound, and the highly complex fjords of the British Columbia Coast and Southeast Alaska. The region has one of the world's longest fjord coastlines.^[34]
The major cities of Vancouver, Portland, Seattle, and Tacoma all began as seaports supporting the logging, mining, and farming industries of the region but have developed into major technological and industrial centers (such as the Silicon Forest), which benefit from their location on the Pacific Rim.
If defined as Oregon, Washington, and British Columbia, the Pacific Northwest has four US National Parks: Crater Lake in Oregon, plus Olympic, Mount Rainier, and North Cascades in Washington. If a larger regional definition is used, then other US National Parks might be included, such as Redwood National and State Parks, Glacier Bay National Park, Wrangell–St. Elias National Park, Grand Teton National Park, and parts of Glacier National Park and Yellowstone National Park. There are several Canadian National Parks in the Pacific Northwest, including Pacific Rim National Park on the west coast of Vancouver Island, Mount Revelstoke National Park and Glacier National Park in the Selkirk Range alongside Rogers Pass, Kootenay National Park and Yoho National Park on the British Columbia flank of the Rockies, Gwaii Haanas National Park Reserve in Haida Gwaii, and the Gulf Islands National Park Reserve in the Strait of Georgia. There are numerous protected areas in British Columbia and in the United States.
Other outstanding natural features include the Columbia River Gorge, Fraser Canyon, Mount St. Helens, Malaspina Glacier, and Hells Canyon. The south-central Coast Mountains in British Columbia contain the five largest mid-latitude icefields in the world.