.......................  ......Fly Fishing Yellowstone National Park

06/04/09

Fly Fishing Yellowstone - Madison and Firehole Rivers - PMD
Hatch

The Madison and Firehole Rivers both have some Pale Morning Duns hatching
around the middle of the day. As I said yesterday, fishing the PMD hatch isn't
just a matter of tying on an imitation of the dun and tossing it out on the river. At
this time of the year, depending on the water temperature, the trout may not
take the duns on the surface as well as they will the emerging nymphs. Another
problem is that the water temperatures will vary depending where you are on the
Madison River or the Firehole River. Actually, on the Firehole River, it will
depend on exactly where you are on the river. The geysers change the water
temperature at different locations.

To help make this simple, if you see the PMDs hatching (see the duns on the
water) and the trout are not taking your dun imitation, change to an emerger
pattern. Our "Perfect Fly" company makes
two versions. One is more like the
nymph than it is the dun and the other one is more like the dun than it is a
nymph. It has a trailing shuck. If you are using our flies, and we hope you do,
then start out with the emerger. If it doesn't work within a few minutes during the
hatch, change to the trailing shuck version. Both flies float down in the surface
skim. At times, especially if the water is on the cold side, the trout will not take
the duns. If they do, then I am sure you would want to fish the dry fly or dun. I
know I would.

As mentioned before, the PMD hatch will last much longer if the sky is cloudy or
overcast. Even then, the hatch will not last all day long. It will only last for a
couple of hours or maybe a little longer. My point is that getting on the water in
the right place at the right time is very important. Otherwise, you won't be fishing
a PMD hatch in either river, the Madison or the Firehole.

The little PMDs won't be hatching in the fast water of the riffles and runs. They
will hatch in the smooth water. In the smooth water, they won't hatch any and
everywhere. They will move from the fast water, smooth or not, to the slower
water areas. This includes slow current seams, pockets behind rocks,
underwater grass beds or where ever the water slows down. These are crawler
nymphs, not clingers that live in the fast water. The best way is to observe the
water carefully. Pay attention and the bugs
will show you where to fish.

Copyright 2009 James Marsh