Clarke's River, Montana, United States (Google Maps ⧉, OpenStreetMap ⧉)

Referenced In

"Captain Lewis, accordingly, with nine men proceed up the eastern branch of Clarke’s river and take leave of their Indian guides."

"On taking leave of captain Lewis and the Indians, the other division, consisting of captain Clarke with fifteen men and fifty horses, set out through the valley of Clarke’s river, along the western side of which they rode in a southern direction."