Originally Posted by Unregistered

Have you talked to Kakashi yet? There should be a blue scroll over his head. If you've, then go to the training field (go through one of the gates that lead to the forest). Once you're in there, you'll see a tree a little bit to the right side with a sign next to it. All you need to do is to use chakra concentration to climb it and get through the tree-jumping and then you'll get to the Forest of Death place.