This fly has been a consistent producer on the lakes recently. The trout move out to deep water in the middle of the lake in summer--on places like Montana's Canyon Ferry reservoir. But in spring and fall they move in close to shore where you can reach them with a fly rod. On days when it's too windy to float the river you can usually find a place--somewhere on the big lake--where the wind will be at your back, with a nice sandstone cliff behind. A good chop on the water is essential. If you use a fly rod bobber five to ten feet above the streamer the waves jig the fly for you. The fish seem to average 17 to 20 inches long. And oh so fat and healthy. River fish never get so heavy. Chartreuse is a hot color. Not sure why. But it is. Pea Sucking Leech didn't ring right. So I call this one the Peaon. It sure has been a good fly for me.