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

03/29/09

I am calling this series Yellowstone Journals and Additional Information. It is a collection of a
rambling mixture of experiences on the streams with some notes, tips and additional
information thrown in. Some of this comes from my video tape logs (record of video shot)
and  notes made on my daily note books.

Fly Fishing the Gallatin River - Part 5

If you pay attention to the many websites with information about fishing the
Gallatin River, you will find very little information on hatches. The information
that is available omits many of the hatches that occur. The Gallatin isn't as
fertile as many of the streams in Yellowstone National Park but it still has a
decent number of hatches. Many of the hatches occur before the season opens
in Yellowstone Park. Several of them occur during the spring runoff. The ones I
will mention occur from about the last week of June on through the season.

Salmonflies are present in the Gallatin River is decent numbers. They start
around the middle of June and last into July most years. Those hatching inside
the park are the last one to hatch. This usually occurs from about the last week
of June to the middle of July.

Just about a week after the Salmonflies start you will start seeing the Golden
Stoneflies. They will last for about a month in the entire river but only a couple,
maybe three weeks, in the park. There are usually more Goldens than
Salmonflies.   

Yellow Sallys start about the middle of July and last to about the middle of
August. They are quite plentiful in the Gallatin River and will be found just about
the entire length of the river in the park and outside of the park.

Blue-winged Olives are present in the Gallatin in fair numbers but the first part
of the bi-brood hatch occurs before the season opens. The second part of the
hatch occurs in September.

You probably want see any hatch charts showing Pale Morning Duns hatching in
the Gallatin but they are present in good numbers. I have no idea why this hatch
isn't mentioned by other sites, but I don't find it listed as an important insect
anywhere. We have found them consistent in numbers worth fishing most
anywhere you fish the Gallatin inside the park and outside of the park. They
show up the first of July and last on into September. I think they are just as
important there as they are in any of the small freestone streams in the park.

There are some other mayflies that hatch in the Gallatin but none of them are
very plentiful. Caddisflies are present anywhere you fish the Gallatin inside and
outside of the park. There are not that many net-builders but there are a lot of
cased caddis that you typically find in freestone streams. Little Black Caddis
hatch before the season opens. Green Sedges, Short-horned Sedges, Little
Brown caddis and a few Spotted Sedges and Little Sister caddis are present.

Sculpin are plentiful in the stream so streamers work well. As I have previously
mentioned, the terrestrial insects are very important. They represent a great
portion of the food available for trout in the Gallatin River.

Copyright 2009 James Marsh
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