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

10/07/09

Catching Yellowstone Cold Water Trout - Part 15
continued from Part 14
The best way to do this is to use little weight, if any, and no strike indicator. If
you must, make it a tiny one. If you make cast into the shallower pockets behind
rocks and boulders, shallow pockets around the bank, slow moving eddies, the
tail end of pools, being careful not to spook any trout that move in and out of the
area, you stand a good chance of catching trout that are feeding on the
nymphs. When I say shallow water, I do not mean water that is only inches deep.
I am distinguishing it from water that is quite deep. Blue-winged olives don't
hatch from the bottom of runs or deep pools. By the way, they don't hatch from
the fast water of the riffles either. They do hatch in the calm pockets within the
riffles where they avoid the fast water.

This type of fishing requires longer than normal cast and longer and lighter than
normal leaders and tippets. I normally use a 6X tippet and at least a ten foot
leader/tippet combination. The emerging duns eventually get caught in the
current seams when they hatch within calm areas of the riffles but not the
nymphs. They will be in the slower moving, shallower water of the pockets or the
tail ends and edges of the pools.

You will find that most of the
baetis species that hatch at this time of the year
are a hook size 18 or 20. The thing that is important about these tiny swimming
nymphs is the fact they are slim. They are not bulky type nymphs. They have
long, thin bodies and slim legs and tails. They can move and dart around like
small minnows. The trout usually shoot into the pockets and slower moving
water where they hatch and try to grab one before it can dart away. You will
sometimes see swirls or flashes of the trout when this occurs. If you are close
enough to see them regularly, you are probably to close to where you should be
placing your fly. By the way, wading around too close will not only spook the
trout, it will also spook the swimming nymphs.

Having a good imitation is important. The trout get a good look at the nymphs in
the slow to moderately moving, clear, cold water they hatch in. That is why our
"Perfect Fly" swimmer, blue-winged olive nymphs are longer and slimmer than
normal. They don't resemble the flat, wide clinger nymphs or the bulky bodied,
heavy legged crawler nymphs. They certainly don't resemble a burrower nymph.
They are tied with goose biots, turkey feather wing pads, dubbing for the thorax
and partridge for the legs and tails. The biots, tied with the barbs out, imitate the
tiny gills of the
baetis very well. The partridge matches the natural alternating
colors of the real blue-winged olive legs and tails very well.
Baetis legs and tails
are not solid colors.

We will continue tomorrow.........

Copyright 2009 James Marsh