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

When to Come and What To Expect:

Fly Fishing: Yellowstone National Park - August - Firehole River

Like the Gibbon River and the Madison River, the Firehole River is usually too warm for
good fishing the first two or three weeks of August. As with the other streams in the
Madison drainage, this greatly depends on the previous year's snow pack and the
weather for the first two months of the season. It is okay some years when the water
situation has been very good. If it hasn't, forget fishing the Firehole River during the
first part of August. It is possible to fish the headwaters and catch some small trout
during this time, but from Old Faithful downstream, it probably won't be.

Usually by the end of the first couple of weeks in August, there will be some cold fronts
move through the high elevations and bring some cold weather to Yellowstone. The  
Firehole River usually starts to cool down towards the end of the month. Remember, all
of its gysers make it slower to cool down than the Gibbon or Madison. Now keep in
mind, these situations vary from year to year and what I say is normal is not really
normal because
as I have said before, nothing is really ever normal about the
weather in Yellowstone National Park.

Nez Perce Creek, the Firehole's largest tributary, would be much cooler than the main
stream. Many of the Firehole's larger trout, especially the browns, will move up into Nez
Perce during the warmer part of the season. This can be a good area to fish,
especially towards the end of August. I would suggest fishing either early in the
morning or late in the afternoon.

The bottom line is that fishing the last week or two of the Firehole River in August can
be good, depending on the weather and water conditions, but don't count on it.

What I do recommend is that you keep in close touch with the local West Yellowstone
Fly Shops. They will know what is going on there. It may be cold for a week with snow
on the ground or it may be still hot more like July than late August. Sorry, but that is
about the best forecast (I should say lack of forecast) I can give.