Copyright 2015 James Marsh
Hatches and Trout Flies for the Fall and Bechler Rivers- Yellowstone
The hatches on the Falls River, also called the Fall River and the Bechler Rivers are very
prolific, especially in their meadow sections. The Bechler River has all the large drakes.
Blue-winged Olives may still be hatching in some areas when the water first clears. There are
several species including the baetis. They hatch twice a year but the Fall season hatch is the
most important one. It takes place in late August and September.
The PMD, or Pale Morning Dun, is the most consistent hatch that take place on either the Fall
River or the Bechler River. They are usually hatching when the water first clears and last
through July and most of August.
Spotted Sedges are very plentiful, especially in the meadow sections or smooth water sections.
They start hatching around the first part of July and last into September. Little Sister
Caddisflies hatch during the same time period.
Green Sedges are very plentiful in the fast water sections. Species of these caddisflies hatch
from about the middle of July all the way into October. Little Short-Horned Sedges hatch
during the first part of July.
Gray Drakes, Brown Drakes, and Green Drakes all hatch from about the first of July until the
first week of August These hatches occur in the smooth meadow section of the streams.
Salmonflies are present in the fast water sections. They start hatching about the first or second
week of July and last for a couple of weeks depending on the water and weather. Golden
Stoneflies will start hatching about the same time. They will be present in good quantities in the
fast water sections of the stream. Yellow Sallies, or Little Yellow Stoneflies, are also plentiful.
They start hatching the middle of July and last until near the end of August.
You will find Yellow Quills, or the Eperous species, hatching from about the middle of July
through the first part of August. Western March Browns start hatching about the same time and
last through the middle of August. Both of these mayflies prefer the faster sections of the
stream such as the riffles and runs.
Grasshoppers, ants and beetles are very plentiful in the meadow section of both the Bechler
River and the Fall River. The high grass along the banks of this section provide the perfect
habitat for them. Imitations of these insect will work during late July, August, and September..
Our "Perfect Flies" have proven to be effective in all of Yellowstone National Park's streams.
We have specific imitations of everything that hatches in the Fall River and the Bechler River
and in all stages of life that the trout eat them in. If you haven't already tried them, we certainly
hope you will. You will very happy you did.
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Fall River, YNP
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