.......................  ....................  ...Fly Fishing Yellowstone National Park
03/05/15
Update on the 2015 Yellowstone National
Park Fly Fishing Outlook

During the fishing season, the streams of Yellowstone National Park get most of
their water from melting snow. Rain adds to it to some extent and the geysers add
some but the great majority of it relies on melting snow. It looks like there is
anywhere from 29 to 56 inches of snow inside the park boundaries. The Snake
River basin is showing about 90% of a normal snow pack. The Yellowstone River is
showing a 100% or normal snowpack for this time of the year. The
Madison-Gallatin River basin is showing only 75% of a normal snowpack. Of
course, there is a long way to go before it quits snowing and the fishing season is
open. I might also point out that it always snows some after the fishing season is
open.

There are a lot of factors that can affect the snowpack between now and mid
summer. You can have early runoff and partial intermediate runoff periods where
some of the snowpack melts before it normally does. You also can have huge
amounts of snow fall very late in the season, so the above figures will change as
we wind down towards the summer.

A good water year is one when the streams stay cool and flowing well throughout
the hottest part of the summer. In the past, some streams have had to be closed to
fishing due to warm water beyond that good for stressing out fighting fish. Not only
that, it also slow the success rate of the catching down when the water gets to
warm. Ideal water temperature should always be below 68 degrees and at times, it
has exceeded that. Again, what keeps it cool in the summer, is plenty of it from
melting snow in the high elevations of the park.
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