The Cascade Range contains several volcanoes, which reach altitudes significantly higher than the rest of the mountains. Mount Rainier, the tallest mountain in the state, is 50 miles (80 km) south of the city of Seattle, from which it is prominently visible. Rainier the most dangerous volcano in the Cascade Range, due to its proximity to the Seattle metropolitan area, and most dangerous in the continental U. These deep forests, such as the Hoh Rainforest, are among the only temperate rainforests in the continental United States.

From the north to the south, these major volcanoes are Mount Baker, Glacier Peak, Mount Rainier, Mount St. Eastern Washington – the part of the state east of the Cascades – has a relatively dry climate, in distinct contrast to the west side.

It includes large areas of semiarid steppe and a few truly arid deserts lying in the rain shadow of the Cascades; the Hanford reservation receives an average annual precipitation of 6 to 7 inches (150 to 180 mm).

Farther east, the climate becomes less arid, with annual rainfall increasing as one goes east to 21.2 inches (540 mm) in Pullman, near the Washington-Idaho border.

The remainder of the state consists of: deep temperate rainforests in the west; mountain ranges in the west, central, northeast and far southeast; and a semi-arid basin region in the east, central, and south, given over to intensive agriculture.

Washington is the second most populous state on the West Coast and in the Western United States, after California.

It borders Idaho to the east, bounded mostly by the meridian running north from the confluence of the Snake River and Clearwater River (about 116°57' west), except for the southernmost section where the border follows the Snake River.

Oregon is to the south, with the Columbia River forming the western part and the 46th parallel forming the eastern part of the Oregon-Washington border. Its northern border lies mostly along the 49th parallel, and then via marine boundaries through the Strait of Georgia, Haro Strait and Strait of Juan de Fuca, with the Canadian province of British Columbia to the north.The Okanogan Highlands and the rugged Kettle River Range and Selkirk Mountains cover much of the northeastern quadrant of the state.The Palouse southeast region of Washington was grassland that has been mostly converted into farmland, and extends to the Blue Mountains.Mount Rainier, an active stratovolcano, is the state's highest elevation at almost 14,411 feet (4,392 m) and is the most topographically prominent mountain in the contiguous United States. Its rugged surface is rich in stands of Douglas fir, hemlock, ponderosa pine, white pine, spruce, larch, and cedar.The state is the biggest producer of apples, hops, pears, red raspberries, spearmint oil, and sweet cherries, and ranks high in the production of apricots, asparagus, dry edible peas, grapes, lentils, peppermint oil, and potatoes.Confusion over the state of Washington and the city of Washington, D. led to renaming proposals during the statehood process for Washington in 1889, including David Dudley Field II's suggestion to name the new state "Tacoma." These proposals failed to garner support. C.'s own statehood movement in the 21st century includes a proposal to use the name "State of Washington, Douglass Commonwealth", which would conflict with the current state of Washington.