Looking south up the Belly River toward Chief Mountain, Gable Mountain and others in the background. The Belly River originates in northwestern Montana at Helen Lake (Lee was there this summer).
Belly River is a river in northwest Montana, United States and southern Alberta, Canada. It is a tributary of the Oldman River, itself a tributary of the South Saskatchewan River. The name of the river may come from the Blackfoot word "Mokowan" or "Mokoan", meaning stomach (the river was previously referred to as Mokowan River).