YEah, that was one LONG train, we followed it about a mile or so and still never saw the locos before the track faded into the trees and was out of sight!
I can only imagine that- our maximum length of trains here in South Africa is +/- 50 wagons, most trains being 39 wagons. We did however once hold the world record for the longest train 660 wagons, 16 locos, 7km.