A short and stout boulder with a rad mono in the middle of it

About 10 minutes downstream from the main Subway cave. Walk over a downed tree, and then under a larger downed tree. Walk between a couple of small boulders, go past a very overhung white prow near and then go past two more boulders that touch each other (with a space between them that can be crawled under). Walk up a hill on your right with a couple small boulder clusters on your left with some chossy rock on your right. As you walk down a hill through some trees, the Master Splinter boulder should be 100 yards farther down on the right side of the wash.