Do Season Passholders or Merlin Annual Passholders get any discount for Tree Top Quest? There are not any discounts available for Tree Top Quest for Season Passholders or Merlin Annual Passholders. You can book your tickets to enjoy the experience here. Related articles How do I book Tree Top Quest? Do I need to book an entry time for the Alton Towers Dungeon? Can I leave Alton Towers Resort and re-enter the same day? What are the opening times for Tree Top Quest? What is Tree Top Quest?