The "Treehouse Boulder" can be found with-in sight of the Highball Boulder. If walking down the hill past "Highball" enter into the open field/meadow and head left towards the "No Opposition Boulder". When halfway through the meadow, turn left again. The boulder is on the right and is obvious due to the giant tree that has fallen on top of it. Beech Bark climbs the slab to the right of the fallen tree, and beside Tree House Arete.