Great Falls of the Missouri River
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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;
- Rainbow Falls;
- Crooked Falls;
- The Great Falls at Ryan Dam
A fifth waterfall (Colter Falls) 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.