After the "no shooting" signs (about a mile and a half past) you can shoot. The rock quarry has very nice mounds of gravels that the bullets fly into. Brad will likely be able to give you the best directions; he is the one who lead the way last time we went. I have directions online, but there are 3 spots I think to shoot. The place we went is my favorite spot, so I would ask him what the best way is. I know he doesn't know the road names though... The place we went you just drive straight to it, there is no hiking involved. You park, get out, and shoot.