I have only been there once, maybe 7-8 years ago, didn't catch anything, saw few jump. It is spring fed and has perhaps the best water (from the spring) I've ever tasted. Also no marking for trailhead or trail for that matter.
The lake gets stocked every few years with cutties and has been so since the 80's. You need a float tube as the lake is round and the deepest part is in the middle so tough to catch fish from shore.