Jefferson River, Montana, United States (Google Maps ⧉, OpenStreetMap ⧉)

Referenced In

"We were therefore induced to discontinue the name of Missouri, and gave to the southwest branch the name of Jefferson in honour of the president of the United States, and called the middle branch Madison, after James Madison secretary of state. These two, as well as Gallatin river, run with great velocity and throw out large bodies of water."

"like that of the Jefferson consists of pebble and gravel. There is some timber in the bottoms of the river, and vast numbers of otter and beaver, which build on its smaller mouths and the bayous of its neighbourhood. The Jefferson continues as yesterday, shoaly and rapid, but as the islands though numerous are small, it is however more collected into one current than it was below, and is from ninety to one hundred and twenty yards in width."

"As far as he had ascended Wisdom river it kept its course obliquely down towards the Jefferson."

"CHAPTER XVI. The party ... reach Gallatin and Jefferson rivers, of which a description is given."

"the rest of the men will accompany captain Clarke to the head of Jefferson river, which serjeant Ordway and a party of nine men will descend with the canoes and other articles deposited there."

"…they reach Gallatin and Jefferson rivers, of which a description is given—arrive at the Yellowstone river…"