The Milk River is a river located in North America, primarily flowing through the states of Montana in the United States and Alberta in Canada. It is approximately 700 miles long and is a tributary of the Missouri River. The river is known for its unique blue-green color, which is caused by the minerals in the water. The Milk River is an important water source for agriculture and wildlife in the region. It supports various ecosystems and provides recreational opportunities such as fishing and boating. The river's basin is also home to several communities and has historical significance for Indigenous peoples and early settlers.