One Two Tree
Oregon White Oak illustration

Oregon White Oak

Quercus garryana

The only oak native to much of the Pacific Northwest, this slow-growing species once shaped vast oak savannas maintained by regular Indigenous burning practices — landscapes now largely lost to fire suppression and development. Its acorns fed people and wildlife alike.

Where found

Open prairies, savannas, and dry foothills of the Willamette Valley and Puget lowlands.

Fun facts

  • Gray squirrels, deer, and livestock all rely on its acorns and young shoots as food.
  • Large trees were historically preferred for shipbuilding, railroad ties, and construction across the Pacific Northwest.
  • Its rot-resistant wood is still used for fence posts and cottage furniture today.

Specs

Oregon White Oak specifications
Height12–25 m (up to 30 m)
Spread12–20 m
Lifespan300–500 yrs
Growth RateSlow
SunFull sun
Native RangeSouthern British Columbia to central California