They are totally props, hollow forms covered with chicken wire, sprayed on the outside with a material similar to stucco, and then painted.  We simply could not find rocks of the right shape and size that also had that great view of the Sierra Nevada mountains.  Most of the pole vaulting rocks are fake, too, even though there were hundreds of rocks all around, because they had to be exactly the perfect distance apart for the stunt people to make their jumps.

There is no ads to display, Please add some