Ride it alot. Day pass is 42 chf’s and thats as many times as you can muster. Slow on the way up but its a LONG way up.
To be honest its actually a little tricky to find your way around there. Its a really big area.
I can recommend doing the following as a warm up. Buy ticket (13chf), goto La Perche, get off. Take left sing and ride allllll the way down and take left hand junction lower down.
Come to road, straight across and look on left. Down to road. Take road down (right) and keep eyes peeled to the left for trail. Take trail alllll the way down to the Valmont Spa place.
Then take road to right and climb slightly to Glion. Straight across at x junction and follow signs for Chauderon. Enjoy the gorge.
That is 1400m of descending. The top is pretty alpine.
amphibian: I will be checking that one out but I think there is a much better way to do it off the back and then coming round and up to the ridge.