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

06/22/09


Fly Fishing Yellowstone - Western Green Drake Nymphs

Both the dodsi and grandis nymphs exist in the streams of Yellowstone National
Park. About the only difference that is of importance is that the
dodsi nymphs
are found in the colder, faster moving water. The
grandis nymphs generally
prefer more moderate flowing water. You will find both in some of the same
streams. What this means of importance is that Green Drake nymphs exist in
both types of water. For example, the Henry's Fork of the Snake River is known
for its Green Drake hatch. One of the prime areas for them is the Railroad
Ranch (Harriman State Park area). It is smooth, flowing but fairly strong current
more like a spring creek. By the same token, the Green Drakes are also found
in the runs and riffles of faster moving water such as you find in the Madison
River.  

These nymphs are crawlers which are fat and stocky nymphs with big, thicker
legs. They cannot swim although they can propel themselves around in the
current on the bottom. They have three very short tails. Before they start to
hatch, the
dodsi nymphs will move from their fast water habitat to nearby slower
moving water. The
grandis species usually hatch in the moderate water that
they live in.

Presentation:
We recommend that you consult our stream hatch charts to determine when the
Green Drakes should hatch for a particular stream. It varies greatly in the park
depending on the location. You can catch trout on our "Perfect Fly" Green
Drake Nymph anytime but it always works great just prior to the hatch.
Imitating the nymphs in the faster streams with pocket water is best done on the
swing. You can rig the imitation to drift just above the bottom using a strike
indicator but it is best to watch your line and leader for a take. If you make very
short up and across cast and hold your rod high on the swing, you can feel the
trout take the fly. This is called the "high stickin" method. You must be in fast
water and approach the runs and riffles carefully to avoid spooking the trout
when you are fishing that short of a line.

In smoother water, we prefer to make longer up and across cast. Mend the line
to help get the fly down and allow the fly to swing around to the down and
across position. You can use a strike indicator if you prefer. Keep the fly near
the bottom. Remember the non-toxic rule inside Yellowstone National Park as
well as the barbless hook rule.