Looks like a old west cowboy scratching to me, I'm a ex cowboy and I can't draw either, hee,hee, that upper box on the right looks like it say's "rocks"....so it might be saying something like "halfway up this draw before the pass, there's something to the right"........so, I'd be checking the history of the area for any cowboy robberies, stagecoaches, bandits, etc....the more you scratch off the list, the closer you'll get to the meaning....also, is that sandstone ?