On Oct 1-2, NARCOA (North American Railcar Operators Ass'n) sponsored an excursion between Remsen-Tupper Lake NY. The first few miles were on the Mohawk, Adirondack & Northern, the remaining 80 miles or so were on Adirondack RR's home rails.

This video includes scenes on Oct 1st in Remsen on the MA&N and in a rock cut in Big Moose NY on the Adirondack:

https://www.youtube.com/watch?v=xLxHXvP-5xw