The Judge Roy true stories are hard to separate from the fiction.
For example, one time the story goes he was in San Antonio. One of his funning buddies sent a telegram back to Langtry claiming to be the Judge.
The telegram instructed the son to kill their pet bear. Which he did.
Pecos, TX ain't that close to Langtry. And the Pecos River is another overused, abused, often fight over in court river.
If you want to see jaw dropping Pecos beauty, you need to go up into the Pecos in NM! Go to the town of Pecos, keep on going North. You are headed for the Pecos headwaters. You will get to the 'iron gate', that's where the Wilderness area starts.