Guided Fly Fishing Trips - Boulder River
The Boulder River in Montana is a Blue Ribbon trout river in Southwestern
Montana where you can find quality rainbow, cutthroat, brook, and
brown trout fly fishing. It provides more than 50 miles of what many
believe is the finest fly fishing in the state of Montana.
All streams on the Absaroka Range have a "boulder bottom" and
consequently very seldom are discolored even during spring runoff.
The Boulder is of unusual purity and many people have no reluctance
to drink the water even as far downstream as 
Big
Timber, which gets
its ample water supply from the stream.
There
are good populations of rainbows in the upper rive rand a solid mix
of browns and rainbows on the lower portion. Fly hatches are quite
heavy, and fish really key in on the hatch. Caddis, mayflies, stoneflies
are commonly fished in March, April, and May. Salmon flies and green
drakes come of as the water begins to build in May. Watch for PMD's
in July and August, along with terrestrials like hoppers and ants.
In the fall some awfully large browns move out of the Yellowstone
and into the Boulder for the spawn.