pass lake is not a high mountain lake. it's a fly-only lake right before you get to deception pass. it is best fished in winter and is known for big fish, but it's hard to catch them. there is a lot of downed trees in that lake making for lots of snags and the fish know it and will go for the trees when hooked.
fish the trees with big leeches or fish the open water with chironomids if you like incredibly boring, slow, and cold fishing. it works though.