OK, I know there has to be a way to get to this place, because I count at least three quests so far that depend on doing so (one of them a main story quest), but, honest to God, I can't figure out what it is. I've been about three-quarters of the way around the circumference of the huge rock wall that surrounds it and spent the last hour and a half of my life (not to mention most of my precious stimpacks) fighting off random attacks from cazadores and I've found nada. Every gap in the wall that looks like a likely prospect turns out to dead-end in a spot that's too steep for my character to climb (or, worse, is just flat enough for him to start climbing, then suddenly becomes so steep that he gets stuck and I have to reload from my last auto-save).

Please help me get into this place. Red Rock Canyon has become far and away the most aggravating thing in this game, even though I've yet to lay eyes it, and I'd like to be done with it now.