Camassia Natural Area - 1

Sculpted by prehistoric floods, this rocky plateau hosts an extraordinary floral diversity including rare plants and uncommon wetland and grassland communities. The rock was exposed 12,000 - 19,000 years ago when the Bretz Floods poured down the present Columbia River Gorge and far into the Willamette Valley. The floods swept soil and vegetation from parts of the valley and deposited granitic boulders (called "glacial erratics") from as far away as Canada.

Location The hills of West Linn, above the Clackamas and Willamette Rivers, in northwest Oregon

Size 26 acres

Conservancy volunteers are restoring Oregon white oak woodlands on the preserve by removing invasive Douglas-fir trees. Additionally, teams of volunteers work to eradicate the invasive, non-native Scots broom from the grassland, and English ivy and Himalayan blackberry from the woodlands.

Oregon fawnlily (Erythronium oregonum)