I checked with someone who knows how things have been done in the third generation of ski train service.Where do they do the run around to head back?
"They run the train to the siding at Fraser and then cut off the power and run it to the other end. The train sits at Fraser all day. one leg on the Tabernash wye has been out of service for years. In the first year or two of the Winter Park Express they had an F40 cab car at the opposite end which eliminated the need to switch power from one end of the train to the other. I think that only lasted a year or two."