Sounds like a long way to go just to boulder. I forget where but I also heard that rumor. Must be true.
Although bouldering is great I would not venture 3 miles up a trail just to do it. I just dont see any sense in it myself. Fuck tie into the rope and scare yourself is what I say. I dont really get much fright from a 10 foot boulder but I do get a good workout.
Just my thoughts.