Thaxor,

Dry fly fishing for trout is infrequently effective on western WA lakes, maybe about 5% of the time. The reason is that most of the insects that make up trout food don't have much of an adult phase of sitting on the water surface when they can be fed on. A few caddis - sedges especially - and callibetis mayfly hatches occur. Otherwise, chironomids, damselflies, and dragonflies don't spend enough time floating on the surface to draw significant feeding activity. However I did see a trout eat a damselfly once. Since most feeding occurs subsurface, you'll catch most of your trout in lakes on nymphs that imitate or simulate chironomids, damselflies, dragonflies, and leeches fished subsurface.

Sg