50's and 60's are pretty warm for trout. So that's probably the reason why they are acting sluggish. One of the things I like to do for lake fishing when the water gets that warm here, is a fly under an indicator, and slow (like 1 strip every 20-30 seconds) Amazing how well it works.

Trout get more active in the fall as the water cools off even more. Our waters are hovering around 35 degrees right now, and the trout are attacking flies like crazy.