Cowlitz Prairie

Cowlitz Prairie is a natural prairie located in Lewis County, Washington, United States. The landform is located along the Cowlitz River and encompasses approximately 6,000 acres (2,400 ha) north of Toledo The Lower Cowlitz tribal group's traditional territory includes Cowlitz Prairie.

The geographical area holds numerous historical locations, including Simon Plamondon's original settlement, the Hudson's Bay Company's Cowlitz Farm, and the first established Catholic mission in Washington state, the Saint Francis Xavier Mission. The prairie was home to Cowlitz Landing, a site used as the first convention to begin the creation of the Washington Territory.

The landform has been of use as a settlement area for various Native American tribes. After non-indigenous claims were first established in the early 19th century, farming and fur trapping became economic factors throughout Cowlitz Prairie. Native people were forced out under decrees by the middle of the century and the existing settlement in the prairie evolved into an early Pacific Northwest mixed ancestry community, sometimes referred as a French Canadian or a Métis settlement.