[6] The Washougal River drains 212 square miles (550 km2) of land that is largely forested, especially in its upper reaches in the Cascade Range and its foothills.

[3] State and county officials monitor the lower reaches of the river for signs of trouble such as harmful bacteria, elevated water temperatures, and bank erosion related to forest clearing and other development.

[7] The Washougal River contains significant fisheries: the main stem and some of the tributaries support populations of Chinook, chum, and Coho salmon, steelhead, and coastal cutthroat trout.

[3] The Washougal River Greenway in Camas has fishing access, a short walking trail, a boat launch, and picnic sites.

[12] From lowermost to uppermost, the named falls include Salmon, Dougan, Naked, Reeder, Stebbins Creek, and Docs Drop.