Copyright 2013 James Marsh
Hatches and Trout Flies for the Snake River Wyoming
Hatches on this part of the Snake River are sporadic and not highly reliable. The diversity
is quite large but only a few species provide high quantities of insects. Midges hatch
throughout the year and are about as reliable as any of the aquatic insects.
The Blue-winged Olives are about as reliable as any of the hatches. They hatch during the
month of April and then again from about the first of September through the month of
October. Most are baetis species that are bi-brooded.
Little Black Stoneflies hatch during the month of April. April can provide some good fishing.
It is prior to the runoff and hatches of these stoneflies and BWOs can provide some good
action. Golden Stoneflies hatch from late August through the first two weeks of September.
There are a few areas where Little Yellow Stoneflies exist in plentiful quantities. They
usually hatch during the months of June and July. Often they are hatching during the
Pale Morning Dun mayflies don't hatch consistently throughout the length of the river but
are present in many areas of moderate water in the river. They hatch from late August
through the month of September. Where you find them, you will usually find them in good
quantities and some good dry fly fishing is possible.
Gray Drakes hatch in a few places of slow moving water. This hatch normally occurs during
the runoff or during the month of June, but can last into July. Mahogany Duns hatch in
September and early October. This hatch can provide some good dry fly action in certain
areas of the river.
From about the middle of August through the month of September, you will find some
isolated hatches of Drake Mackerels. That's a local name for a large Timpanogo hecuba
mayfly that is similar to the Green Drakes. A large size Green Drake imitation will work for
Caddisflies are very abundant on the Snake River. There are a few places where Little
Black Caddis (brachycentrus species) exist. They hatch during late April and early May.
This hatch doesn't occur throughout the river, only in isolated places. The majority of the
caddisflies start hatching in June during the runoff.
The most important caddisflies are the Spotted Sedges. There are several species that
hatch from June through the month of September. You will also find some isolated hatches
of Little Short-horned Sedges. These caddisflies normally hatch in late June and July.
October Caddis hatch from about the middle of September through the month of October.
This hatch can provide some excellent fishing.
The Snake River has plenty of baitfish, minnows and sculpins. Streamers that imitate these
fish work well throughout the season.
The terrestrial season usually runs from about the middle of June through the month of
September. Imitations of ants, beetles and grasshopper work during this period of time.
Grasshopper imitations are very popular on the Snake.
If you haven't done so already, please give our "Perfect Flies" a try. They are the most
imitative of the naturals of any flies that can be purchased. They are also the most
effective and fooling trout. Our sandwich grasshopper imitations have proven very effective
on this river.
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Snake River Wyoming
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