The Big Joe boulder is a gigantic formation with a big steep roof that contains some classic problems. The boulder is just a few hundred feet up the gully from the parking area. In addition to the Big Joe roof problems there are some other great boulders up the gully.
Big Joe lies directly across the street from the riverside area pullout. walk up the hill about 50 yards and you will find the huge roof that houses numerous problems from V4-V10.