Copyright 2010 James Marsh
Hatches and Flies for Lava Creek (YNP) Wyoming
There are several species of caddisflies, mayflies, and stoneflies in Lava Creek. It holds a
lot of aquatic insects both below and above the falls for such a small stream.

Blue-winged Olives,
Baetis species, hatch from opening day until the end of the month of
June but it is usually too early to fish the stream. They are bi-brooded and hatch again
staring about the first of September and lasting until the season ends.

The Green Sedges, very plentiful in Lava Creek, start hatching about the first of July and
last until the middle of September. The Little Short-horned Sedges will hatch throughout
the month of July.

The PMDs, or Pale Morning Duns, are the most plentiful mayfly on this small stream. They
start about the first of July, and last all the way to the middle of August. We have also
found Green Drakes and Flavs, or small Western Green Drakes present in July.

Yellow Sallies, or Little Yellow Stoneflies, hatch from about the middle of July for a month or
longer in the creek. The lower section has a few Golden Stoneflies and Salmonflies. We
haven't caught the hatch right on this stream yet, but based on the numbers of nymphs in
the stream, it appears that it would be very good. They probably start hatching the first
week of July and most likely last about two or three weeks in the short lower section.

Terrestrial insects are very important trout food on Lava Creek. Imitations of grasshoppers,
ants and beetles will catch trout from about the first of July until the middle to end of

We have "Perfect Fly" imitations of every insect that hatches in Yellowstone National Park.
Many of our flies were developed there. If you haven't already done so, we encourage you
to give them a try. They are not only are the most realistic flies you can buy, they are the
most effective at catching trout. We also have numerous generic and attractor flies at very
low prices that will work for the small brook trout.
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Lava Creek (YNP) Wyoming
Options For Selecting Flies:
1. Email us (
with the dates you will be fishing this
stream and we will send you a list of our
fly suggestions. Please allow up to 24
hours for a response.

2. Call us 800-594-4726 and we will help
you decide which flies you need.

3. Email us (
with a budget for flies and we will select
them to match the budget and get them to
you in time for your fly fishing trip.

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U. S. Orders over $100 are shipped via
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