How do you get to crash island on runescape?

To get to the Crash Island in RuneScape, you must be either in the process of, or are finished with the quest Monkey Madness. Crash Island is used to get to the Ape Atoll. To get to Crash Island, go to the Grand Tree. Then, go to the second level and go east. Speak to the Gnome with a mask on. He will bring you to the Hangar. Speak with the pilot near there, and he will bring you to the Crash Island.