St. Maries River is a tributary of Coeur d Alene Lake and is thus part of the Spokane River Basin and the Columbia River Basin. The River is a good spring run for rafting and kayaking. The whitewater is gentle and the surrounding forests are beautiful. This run goes through a secluded canyon with thick pine forests providing many opportunities to view wildlife. It is relatively overlooked river in Idaho, making it an uncrowded floating experience.