I was doing a live-broadcast from the Battle of Plattsburgh commemoration weekend yesterday when the North-Bound Amtrak Adirondack (NY Penn to Montreal) pulled across the Saranac River bridge. Just behind the Genesis was a Amtrak full-length dome-car:
According to employees, the car is added on at Rensselaer North-bound, and cut off there South bound. It will remain in the consist through foliage season.