Take the gravel road up and follow signs to Supertree. White trail veers off to the right shortly thereafter and you'll see a sign with the Supertree icon pointing you to the left. After a long gravel ride, you'll start the Supertree up and down before beginning a long descent to the creek. Most of the latter part of the trail was affected by logging and it's not quite as fun as it once was, but may be worth the effort if you are looking for some miles.
As of February 2016, Supertree has been rerouted in three places to include more singletrack and less fire road.