Who thinks the start of the Missouri River starts in Missouri? Well it doesn’t. It starts in Montana, in what was known as old “Gallatin City I & II” of the mid 1800s.
“The object of your mission is to explore the Missouri River and such principal stream of it, as, by it’s course & communication with the waters of the Pacific Ocean…may offer the most direct & practible water communication across this continent…” from Thomas Jefferson’s instructions to Meriwether Lewis, July 4, 1803.
Here 3 Rivers flow into what is the beginning of the Might Missouri River. The Gallatin river was named and Lewis and Clark named the other 2 the Jefferson River and the Madison River. The Madison River flows into the Jefferson River and then the Gallatin River runs into that as it forms the beginning of the Missouri River.
This was also the site of Colter’s Run. I’ll just put a picture of the story so I don’t have to copy it 🙂