Oregon is a state in the Pacific Northwest region of the United States.
The United States of America, commonly referred to as the United States or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions.
The Pacific Northwest, sometimes referred to as Cascadia, is a geographic region in western North America bounded by the Pacific Ocean to the west and loosely, by the Rocky Mountains on the east.
Oregon is bordered on the west by the Pacific Ocean, on the north by Washington, on the south by California, on the east by Idaho, and on the southeast by Nevada.
Nevada is a state in the Western, Mountain West, and Southwestern regions of the United States of America.
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The Columbia River delineates much of Oregon's northern boundary, and the Snake River delineates much of the eastern boundary.
It is one of only three states of the contiguous United States to have a coastline on the Pacific Ocean, and the proximity to the ocean heavily influences the state's mild winter climate, despite the latitude.
The contiguous United States consists of the 48 adjoining U.S. states plus Washington, D.C., on the continent of North America.
Oregon was inhabited by many indigenous tribes before Western traders, explorers, and settlers arrived.
An autonomous government was formed in the Oregon Country in 1843, the Oregon Territory was created in 1848, and Oregon became the 33rd state on February 14, 1859.
The Territory of Oregon was an organized incorporated territory of the United States that existed from August 14, 1848, until February 14, 1859, when the southwestern portion of the territory was admitted to the Union as the State of Oregon.
The Oregon Country was a predominantly American term referring to a disputed region of the Pacific Northwest of North America.
Today, at 98,000 square miles, Oregon is the ninth largest and, with a population of 4 million, 26th most populous U.S. state.
A state is a compulsory political organization with a centralized government that maintains a monopoly on the legitimate use of force within a certain geographical territory.
With 609,456 residents, Portland is the largest city in Oregon and ranks 29th in the U.S. Its metro population of 2,314,554 is 24th.
The Willamette Valley in western Oregon is the state's most densely populated area, home to eight of the ten most populous cities.
The Willamette Valley is a 150-mile long valley in the Pacific Northwest region of the United States, located entirely within the state of Oregon.
Oregon's landscape is diverse, with a windswept Pacific coastline; a volcano-studded Cascade Range; abundant bodies of water in and west of the Cascades; dense evergreen, mixed, and deciduous forests at lower elevations; and a high desert sprawling across much of its east all the way to the Great Basin.
In the fields of horticulture and botany, the term deciduous means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, after flowering; and to the shedding of ripe fruit.
The Cascade Range or Cascades is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California.
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
The tall conifers, mainly Douglas fir, along Oregon's rainy west coast contrast with the lighter-timbered and fire-prone pine and juniper forests covering portions to the east.
Pseudotsuga menziesii, commonly known as Douglas-fir, is an evergreen conifer species native to western North America.
A pine is any conifer in the genus Pinus,, of the family Pinaceae.
Abundant alders in the west fix nitrogen for the conifers.
Alder is the common name of a genus of flowering plants belonging to the birch family Betulaceae.
Stretching east from central Oregon are semi-arid shrublands, prairies, deserts, steppes, and meadows.
Prairies are ecosystems considered part of the temperate grasslands, savannas, and shrublands biome by ecologists, based on similar temperate climates, moderate rainfall, and a composition of grasses, herbs, and shrubs, rather than trees, as the dominant vegetation type.
In physical geography, a steppe is an ecoregion, in the montane grasslands and shrublands and temperate grasslands, savannas and shrublands biomes, characterized by grassland plains without trees apart from those near rivers and lakes.
Shrubland, scrubland, scrub, brush, or bush is a plant community characterised by vegetation dominated by shrubs, often also including grasses, herbs, and geophytes.
At 11,249 feet, Mount Hood is the state's highest point, and Crater Lake National Park is Oregon's only national park.
Mount Hood, called Wy'east by the Multnomah tribe, is a potentially active stratovolcano in the Cascade Volcanic Arc of northern Oregon.