There are places where the terrain is softer than other places I have gone, but, the devs didn't want me going that way, and slapped up an invisible barrier. Guess what? If I can climb the hill, and find a nice sniping position, I don't really care that the devs didn't think I should be able to do that. Hell, I can't even climb antenna towers up the side of single story buildings, which is something I used to do on a daily basis......

Okay, mod your PC if you wanna do that then.

If you are on a console, that's too bad for you, personally I don't care about the barriers as one minute to find another way won't kill me.

Quarry Junction. One way in. one way out. (at least, without having to deal with a selection of deathclaws). Remove the barriers? Climb the hill, pick a spot, and snipe away.