The Shell River is a 47.8-mile-long (76.9 km) tributary of the Crow Wing River in north-central Minnesota in the United States. Via the Crow Wing River, it is part of the watershed of the Mississippi River, draining a rural region.

The Fish Hook River, also spelled Fishhook River, is a tributary of the Shell River, 9 miles (14 km) long, in north-central Minnesota in the United States. The river's source, Fish Hook Lake, collects short tributaries known as the Portage River and the Potato River. Via the Shell and Crow Wing rivers, the Fish Hook River is part of the watershed of the Mississippi River. The river flows for its entire length in southwestern Hubbard County; its watershed extends into northeastern Becker County.