Great Falls (Missouri River)

The Great Falls of the Missouri River are a series of waterfalls on the Missouri River in north-central Montana. Historically, the falls marked the limit of navigable section of the Missouri River. The falls are:

• Black Eagle Falls;
• Lower Rainbow Falls;
• Upper Rainbow Falls; and
• Great Falls

A fifth waterfall formerly existed on the river, but it now lies in the impounded area behind Rainbow Dam. The falls were well-documented by the Lewis and Clark Expedition; the portage around the falls was a significant event of the expedition.

The city of Great Falls, Montana derives its name from the falls.