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 Is Fastrack available? What is Tree Top Quest? Are there any restrictions for Tree Top Quest? Does my Merlin Annual Pass/Merlin Monthly Membership allow me entry into the Alton Towers Dungeon? What is the Challenger Tree Top Quest like?