The Valley River is a river in southwestern Manitoba, approximately 145 kilometres long, originating in the Duck Mountains and flowing eastward through a deep valley that separates the Duck Mountains to the north from the Riding Mountains to the south, before draining into Dauphin Lake. The river descends from an elevation of roughly 671 metres above sea level at its source to 261 metres at its mouth. It flows through the Rural Municipalities of Grandview and Dauphin, passing through farmland along much of its paddleable length.

The recommended paddling section runs from Provincial Road 274 near Gilbert Plains to Provincial Road 362, covering approximately 32 kilometres over two days. The trip can be extended by starting further west than Gilbert Plains and finishing at Highway 10. The river carries a Class II rating and is generally canoeable until late May, making spring the primary paddling season. There are no portages on the standard route.

Paddlers should watch for sweepers, rocks, and deadfall throughout the trip. The river travels through farmland, though the high banks on either side largely screen agricultural areas from view. Campsites along the route are scarce but not crowded. The valley itself is a notable geographical feature, carved through ancient glacial deposits associated with Lake Agassiz and forming a prominent cut in the Manitoba Escarpment landscape.

The Valley River is recognized as one of several popular paddle routes in the western parkland region of Manitoba, alongside the Assiniboine, Red Deer, Woody, Swan, Whirlpool, and Turtle rivers.