The Saint Maries River flows through Benewah and Shoshone counties in Idaho, serving as a tributary to the Saint Joe River. This 45.8-mile waterway has facilities including boat ramps, docks, restrooms, and campgrounds, with ADA access available at certain locations. The river has a rich history of fish stocking, particularly rainbow trout, though current management emphasizes conservation of native species. Northern pike, considered an invasive species that may harm existing fisheries, are present and harvest is encouraged with no bag limits.