Planning Your Fly-fishing Trip To Yellowstone
...........................  ......................Fly Fishing Yellowstone National Park

When to Come and What To Expect:

Fly Fishing: Yellowstone National Park - July - Gardner River

The Gardner is another cold river that really doesn't get to fishing very well during most
seasons until about the first of July.  They may be a few opportunities to fish it prior to
that but it isn't likely the water will be clear and warm enough until the first of July. The
Spring runoff usually ends in early July.

The Gardner begins high in the Gallatin Mountain Range. The first point you can fish it
via road is the point it flows under the Seven Mile Bridge at the Norris - Mammoth
Grand Loop Road where several small meadow streams join it. From there it takes a
seven mile trip through the Sheepeater Canyon before it flows under the high bridge
on the Grand Loop Road between Mammoth and Tower not far from Mammoth. The
sections described so far are mostly brook trout with some small rainbows mixed in the
lower section. Osprey Falls is located about half way up the canyon and the brown,
rainbow and cutthroat trout cannot get above the one-hundred foot high waterfall. Not
far below the bridge, it is joined by Larva Creek. The river flows around Mammoth area
where it become accessible at the 45th Parallel Bridge at the North Entrance Road, not
but about three miles from the North Entrance to the park.

The section from the North Entrance to the high bridge on the Mammoth-Tower Road
provides the best fishing during July. The entire lower Gardner River is a rough, fast
pocket water stream with some huge boulders. The first major hatch as soon as the
water begins to clear in late June/early July, are the giant salmonflies. They will hatch
through the first part of July. Not long after they get started, Golden Stoneflies will join
them and continue for most of the month of July. Little Yellow Stoneflies will also be
hatching during the later part of July.

PMDs will also be present, along with a few Blue-winged Olives. There doesn't seem to
be a large mayfly population in the river. It has March Browns but they hatch prior to
the water clearing.

Caddislflies of several species start hatching the first of July. The LIttle Short-horned
Sedges and Green Sedges hatch for most of the month. About the middle of July,
Spotted Sedges will begin to hatch and provide some late evening action. The main
July event is the Stoneflies. The Gardner has a huge population of them and the
largest of its rainbows, browns, cutbows, brooks and cutthroats will feed well to the

Copyright 2010 James Marsh