Please meet your guide on the steps outside of Castle Clinton's North Entrance (the far side from the water).
The tour guide will be there 15 minutes before the tour starts and will be wearing an orange hat AND/OR a blue shirt or jacket.
The 2-Hour Express tour will end at Liberty Island. You can then use your ticket to continue on your own to Ellis Island.
The 4-Hour tour will end on Ellis Island. You can choose to stay there longer and explore on your own or take the first ferry back to Battery Park.