Self defense with a handgun is not inconcievable at ranges of 50 to 100 yards, and could easily be justified.
Inconceivable no, exceedingly darn rare yes. I can see the meth heads chasing you, they are some of the most screwed up people I've ever had the displeasure of dealing with. Prone to extreme, uncontrolled, irrational violence. I believe that in national parks and forests, away from the beaten path, you should not be allowed to just carry a CCW, but an open carry or a rifle or shotgun. You should be able to say you are carrying those things for protection and not have to be hunting. In the public anti gunners say "Call 911" Now how are you going to do that from the middle of a forest and what is that response time?
Some years ago I was hiking in Wayne National Forest with my first wife. We came upon two guys walking in the opposite direction. Scummy looking guys. One got close to the other and said something I couldn't hear while leering at my wife. I knew something was up. They continued looking at her as they approached, until they noticed the 357 strapped to my hip. Their attitudes and body language instantly changed.