I was out fishing with a friend the other day. I had not been out for awhile and we finally had a beautiful day that was sunny and in the 40's.
The temperature of the water was the usual winter cold, 39 or 40 degrees. We anchored the boat at a spot that always held fish. This time of year when the water is this cold, the trout usually hang in slower, deeper water as well as slow edges off the fast water.
The exception is at the warmest part of the winter day there will be some fish in the riffles.
We started searching the water, working our way upstream for about 30 minutes, resulting in no strikes. We then decided to get in the boat and move to another spot. At our next destination, "historically famous hole on the Bighorn", my brain started to click on and I realized that there should have been fish eating at the first spot so I started setting the hook instinctively and then hooked fish.
What I had then realized was the fish were barely touching the fly. So you have to set the hook by feel and where you think there should be a fish.
I have said this before in this winter fishing report, when the water temperature is very low, the trout's metabolism slows way down. They do not have to eat as much and will not move for the fly.
The fly must hit them right on the nose.
Anyway, we had a pretty good day, caught some very nice fish and got off the river before the sun went down.