....................... ......Fly Fishing Yellowstone National Park
Fly Fishing Yellowstone - Pale Morning Dun - Nymph
Trout eat the Pale Morning Duns on a regular basis because they are exposed most of the time. They are crawlers that cannot hide underneath the rocks like the clingers but they can get down between them and in vegetation. The like the cobble and gravel bottom that is found in many of the streams in Yellowstone National Park. The nymphs can swim, just not very well. They prefer moderately flowing water. They can be found in streams that consist mostly of pocket water because they can find many places within the faster water streams that provide the right type of habitat. You will find a good population in the Gallatin River, for example. They will reside in the pockets behind boulders and along the banks. The ends of long runs and riffles can also provide the right habitat. The nymphs are usually very plentiful in the streams that have them and fishing an imitation of them isn't a bad fly choice anytime.
Presentation: If you are fishing at times when there isn't a hatch occurring, you would fish the nymph in the moderately flowing water with or without a strike indicator. We prefer not to use one, but you can certainly catch trout using one. If a hatch is occurring, you may want to fish an imitation of the nymph up until the time the hatch starts. They usually hatch about the middle of the morning. You may want to try to imitate the nymphs swimming to the surface to hatch in the surface film. A floating nymph fished just under the surface works when the hatch is underway, but we prefer to use an imitation of the emerger.
If you are fishing prior to the hatch, we suggest you fish the nymph imitation in the current seams and through the long runs. Use short, up and across cast and follow the nymph downstream with the tip of the rod. Allow the nymph to swing down and across before casting again.
Smooth water in rivers such as the Madison and Firehole can be very deceptive. The current is usually strong even though the water is smooth. Theres a lot of vegetation that your fly will hang on unless you select the areas to drift your nymph through. It is also difficult to keep a drag free drift in the swirling currents. I watch the end of my fly line to detect strikes but you may prefer to use a small strike indicator.