When you are able to read the river or stream you increase your chances of catching that trout. Most streams will have a current that creates a pattern that is known as the riffle-run-pool pattern. This pattern will continue to repeat itself over and over again. You’ll find big brown trout in deep pools while the smaller browns and rainbow trout can be found in runs. The riffles will contain small trout during day hours and bigger trout during the morning and evening feeding times.
Many fly fishers overlook streams in favor of lakes or rivers. This, however, can be a big mistake. Streams provide great options for fly fishing, especially those streams that have cool water. Trout seem to enjoy streams since they can live in deep holes that are found just underneath the rapids. They also enjoy hovering beneath undercut banks since the water current here is calmer but still has a flow to it.