Hell Roaring Creek is a fast-running creek in southern

Montana Montana () is a state in the Mountain West division of the Western United States. It is bordered by Idaho to the west, North Dakota and South Dakota to the east, Wyoming to the south, and the Canadian provinces of Alberta, British Columb ...

. The creek flows from Brower's Spring, which is considered the ultimate source of the Missouri River.Demetriades , Anthony (July/August 2005
"The True Utmost Reaches of the Missouri"
''Montana Outdoors'' Hell Roaring Creek is the most distant point in the

Mississippi River The Mississippi River is the List of longest rivers of the United States (by main stem), second-longest river and chief river of the second-largest Drainage system (geomorphology), drainage system in North America, second only to the Hudson B ...

system and, combined with its downstream rivers, marks the starting point of the fourth longest river in the world.

References

Rivers of Montana Missouri River Tributaries of the Missouri River Tributaries of the Beaverhead River {{BeaverheadCountyMT-geo-stub