I stopped by Amistad National Recreation Area, which is an artificial lake on the Rio Grande. It is on the border with Mexico. There is a dam that I wanted to see, it but as I got close there is a customs and border patrol station and I didn’t want to go into Mexico, so I turned and went to the marina. I learned later that there is an unmarked road that goes to the dam without crossing the border, but oh well.
The Pecos river is part of the Amistad NRA also