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. Slime Line is on the downhill face of the boulder.
SDS - "Slime Line Direct" begins on a crimpy pinch and a low slopy ledge. Move straight up through the middle of the overhanging face. Top out at the highest point of the face. Avoid the jugs out right.