sentences:  It flows into the Crow Wing River in Crow Wing Lake Township in Hubbard County.The Shell River is the Crow Wing River's first significant tributary, and is substantially the larger of the two at their confluence; the Shell's average discharge of 250 cubic feet per second (7 m³/s) is approximately three times the Crow Wing's discharge above the confluence.The Shell River flows in the Northern Lakes and Forests ecoregion, which is characterized by conifer and hardwood forests on flat and rolling till plains and outwash plains.