Crater Lake National Park opens; Congress passes Federal Reclamation Act; Voters amend Constitution for Initiative and Referendum, allowing citizens to propose new laws and constitutional amendments

Heppner Flood kills 225 people; First Voters' Pamphlet published

Direct primary law passes; First Black American man, George Hardin, named officer in Portland Police Bureau

Lewis and Clark Centennial Exposition commemorates the 100th anniversary of the Lewis and Clark Expedition; Klamath Irrigation Project begins; Oregon land fraud trials pursue high-profile wrongdoers

City home rule law approved, allowing extensive city lawmaking authority; Indictment by grand jury law approved; Taxes begin on telephone, telegraph and railroads; First meeting of Association of Oregon Counties

President Theodore Roosevelt creates "Midnight Reserves" setting aside millions of acres of national forests

Constitution amended for Recall provision; First woman, Lola Baldwin, named head of Women’s Division, Portland Police​

State’s Central Fish Hatchery opens at Bonneville; Oregon Caves National Monument created; Pendleton Round-Up begins; Congress passes Enlarged Homestead Act; Carolyn B. Shelton serves as acting governor when Governor Chamberlain resignes to be sworn in as U.S. Senator. She serves for 48 hours, and is Oregon’s first female governor

Three-fourths verdict in civil cases approved; Employers’ Liability Act approved

Columbia River Gorge Highway construction begins; First U.S. primary elections held in Oregon; Oregon Trunk Railroad completes line to Bend

Women’s suffrage approved; Prohibition of private convict labor approved; Eight-hour day on public works approved; First U.S. minimum wage law approved

Presidential preference primary law approved; Governor Oswald West declares beaches open to public

Death penalty abolished; Prohibition approved; Eight-hour day approved for women; Congress revests O & C Railroad land grant; Marian B. Towne is first woman elected to Oregon’s House of Representatives; Legislature requires publication of​ Oregon Blue Book

Kathryn Clarke wins Douglas County special election to serve as first woman in the Oregon Senate

Workmen complete Celilo Locks and Canal; Congress passes Stock-Raising Homestead Act

U.S. Army Spruce Production Division begins logging

Influenza pandemic kills hundreds; Emergency Fleet Corporation contracts for ships; Oregonians enlist to serve in World War I​

Oregonians enlist to serve in World War I

First state gasoline tax in U.S. authorized to fund highways

Death penalty reinstated; Oregon League of Women Voters founded

Ku Klux Klan organize chapters; Hurricane hits Oregon and Washington; ballot measure allowing women to serve as jurors passes

First state park opened by Oregon Highway Commission south of Monmouth, named for Sarah Helmick; Compulsory School Act approved, outlawing private and parochial schools and requiring children aged 8 to 18 to attend public school; First Black American woman, Beatrice Cannady, graduates from Lewis & Clark Law School; Japanese American Citizens’ League founded

Alien Land Law approved, preventing first generation Japanese Americans from owning or leasing land; Alien Business Restriction Law approved, denying business licenses to first generation Japanese Americans; Prohibition of sectarian garb in schools approved

Congress extends citizenship to Native Americans; Compulsory School Act held unconstitutional; Mary Jane Spurlin first female judge in Oregon; Clarke-McNary Act aids federal-state forest fire protection

State parks and waysides authorized; League of Oregon Cities founded

Fishwheels abolished; Astor Column completed; Exclusion of Black Americans clause removed from Constitution​

State Constitution amended to remove voting restrictions on Black and Chinese people​

State Park Commission created

Vale Irrigation Project begins water delivery; First Oregon woman judge, Mary Jane Spurlin, appointed to Multnomah County District Court

Tillamook Burn destroys 350,000 acres of old growth timber; Civilian Conservation Corps and Works Projects Administration start projects

First grazing district under Taylor Grazing Act forms at Bonanza

Congress authorizes Bonneville Dam; Fire destroys State Capitol

11 die as Bandon Fire destroys town; Nan Wood Honeyman is first Oregon woman elected to U.S. House of Representatives; Five major bridges are completed on Highway 101

President Franklin D. Roosevelt dedicates Timberline Lodge and Bonneville Dam; Gas chamber built at Oregon State Penitentiary for capital punishment; Oregon Shakespeare Festival forms in Ashland; Congress creates Bonneville Power Administration; Bankhead-Jones Act authorizes buyout of homesteaders

544 Report approved for Willamette River flood control; Bonneville Dam completed

Second Tillamook Burn destroys 310,000 forest acres; State capitol completed in Salem

Oregonians enlist to serve in World War II

Executive Order 9066 authorizes removal of Japanese Americans to internment camps; Japanese submarine shells Fort Stevens; Siskiyou National Forest firebombed by Japan; U.S. Army builds Camp Adair and Camp Abbot; U.S. Navy builds Tillamook and Tongue Point Naval Air Stations; Vanport founded to house wartime workers

Six Oregonians die in explosion of Japanese incendiary balloon near Bly; Third Tillamook Burn destroys 125,000 forest acres; Supplement to 1923 Alien Land Law passes​

Portland State University founded; Rural School Law encourages consolidation of districts

Plane crash kills Governor Snell, Secretary of State Farrell, and others

Columbia River Flood destroys Vanport; Vollum and Murdock found Tektronix

State Department of Forestry begins replanting Tillamook Burn; Fair Labor Practices Commission established; State Supreme Court invalidates 1923 and 1945 Alien Land acts; First woman, Dorothy McCullough Lee, elected Portland mayor