The Missouri is the longest river in the United States. Its headwaters are in the appropriately-named Three Forks, Montana where the Jefferson, Madison, and Gallatin Rivers join.
Please explore these panoramic images, taken September, 2014 from Headwaters State Park. You can double click to zoom way in and use the left mouse to pan around. You can also use the + and – keys to zoom and the arrow keys to scroll. Please wait for the resolution to download.
Gallatin River Oxbow