Mont Tremblant Lodge ski map from circa 1973-74 to 1978. This was the map the resort used when I started skiing Tremblant.
This map was particular in the way it was meant to be read. Both sides of the mountain meet at the top and you needed to fold part of it to see the trail names for that side. The map perspective was from the skier point-of-view, reading and looking at the trail from the top. So the bottom of the map for the side was actual the summit and the top would be the base.
Note the symbols for the degree of difficulty of the trails. Profile of the mountain on the side and shaded area where the mountain dips halfway up where you need to ski down to catch the lifts the summit.
It was an interesting concept, a concept that wasn’t carried over in the following versions of the Tremblant ski maps.