Wikipedia EN Sun River
The Sun River (also called the Medicine River) is a tributary of the Missouri River in the Great Plains, approximately 130 mi (209 km) long, in Montana in the United States. It sits in the Sun River Valley, also commonly referred to as The Valley for short, a river valley in Cascade County. The valley helps support agriculture with access to irrigation.
Source: Wikipedia https://en.wikipedia.org/wiki/Sun_River