Thousands of years before present
Approximately 80 tribes of Native Americans inhabit the region we define as Oregon today.
Spanish galleons explore the coast of Oregon.
Captain Robert Gray enters the river we now call the Columbia, and names it after his ship, the Columbia Rediviva.
Oregon's streams, rivers, and lakes teem with fish and beaver. Commerce in beaver pelts attracts explorers, trappers, and traders to the region.
Captains Lewis and Clark travel with their party from Missouri to the mouth of the Columbia River.
Civil government is established in the Oregon Country. Major immigration to Oregon begins along the Oregon Trail, with over 53,000 people traveling the Oregon Trail between 1840 and 1850.
Francis Parkman travels in the West and later writes about his travels, which stimulates interest in the Oregon Trail.
Measles decimate native tribes.
The Oregon Territory is organized. Gold is discovered in California.
Congress ratifies the Oregon State Constitution, and the state accepts the congressional proposal to be admitted to the Union.
Congress passes the Homestead Act, allowing 160 acres to those who would live on and work the land. Gold is discovered in eastern Oregon, in Baker and Grant counties.
The first salmon cannery on the lower Columbia begins production.
Modoc Indian War.
Nez Perce War.
Bannock Indian War. Salmon canning increases from 10,000 cases in 1869 to 450,000 cases in 1878. Salmon becomes the leading export after wheat and flour.
The transcontinental railroad is established.
Portland's outdoor club, the Mazamas, holds its organizational meeting on the top of Mt. Hood, with 155 men and 38 women at the summit.
Pres. Theodore Roosevelt signs a measure approving Crater lake as the 7th national park in the United States.
The World's Fair, also known as the Lewis and Clark Centennial Exposition, is held in Portland, which ignites interest in tourism in Oregon.
Columbia Gorge Highway is built beside the Columbia River.
The United States enters World War I.
The Great Depression begins.
The 275,000 acre Hart Mountain National Antelope Refuge is established as a federal wildlife refuge.
The Tillamook Burn, one of the United States' worst forest fires, destroys 240,000 acres of timber.
Civilian Conservation Corps projects, called Franklin Roosevelt's "Forest Army," begin in Oregon. Trails, parks, and amenities are built at Silver Falls and at hundreds of other sites in forests of the Cascade Mountains.
Timberline Lodge, built as a Works Progress Administration project, is dedicated by President Franklin Roosevelt.
The United States enters World War II.
The Dalles Dam, which floods the major Indian fishing area on the Columbia -- Celilo Falls -- is completed.
The Confederated Tribes of Warm Springs invest part of their $4 million Celilo Falls settlement to develop a recreation facility called Kah-Nee-Ta.
Congress passes the Clean Air Act.
Oregon Beach Bill is signed into law by Gov. Tom McCall, decreeing that all land within sixteen vertical feet of the average low tide mark belongs to the people of Oregon.
Wild and Scenic Rivers Act is passed by Congress.
The National Environmental Policy Act is enacted.
The Oregon Bottle Bill is approved, the first in the nation.
Governor Tom McCall invites people to "Come visit us again and again. This is a land of excitement. But, for heaven's sake, don't come here to live."
Congress passes the Endangered Species Act.
Confederated Tribe of Siletz wins restoration of trust relationship.
Congress lists the Oregon Trail as a National Historic Trail.
Cow Creek Band of Upper Umpqua Indians wins restoration.
Confederated Tribes of Grande Ronde wins restoration.
Confederated Tribes of Coos, Lower Umpqua, and Siuslaw Indians win restoration of trust relationship.
Northern Spotted Owl is listed as a threatened species by the U.S. Department of Fish and Wildlife.
Oregon Trail 150th Anniversary Celebration.
Northwest Forest Plan expands environmental protection on 24 million acres of of northern spotted owl forests.
Tourism is Oregon's third leading industry.