The Ouachita , part of the Red River basin , flows southward to Louisiana 's Black River , then to the Red River and Natchitoches , Louisiana .
From Hot Springs , roughly midway on the footpath , Natchitoches Trace followed the Ouachita River downstream .
The Ouachita River , part of the Red River basin , flows southward to Louisiana 's Black River , then to the Red River and Natchitoches , Louisiana .
From Hot Springs , roughly midway on the footpath , Natchitoches Trace followed the Ouachita River downstream .