Our Boulder River fly fishing trips are half fishing / half raft trip – in other words exciting fly fishing

While your guide expertly rows the raft through class I, II & III rapids you’ll be hitting the pocket water in this fast paced fly fishing adventure. The Boulder River is a Blue Ribbon trout stream with quality rainbow and brown trout.

Fly fishing the Boulder River depends on water levels and is typically floatable between late July and early August. As water levels vary from year to year we cannot guarantee that this will be an option during your stay, but contact us in the Spring and we’ll typically be able to give you our best guess-timate.


Includes rods, reels, flies and catered riverside lunches
* Suitable for most ages 12 & over

Fly Fishing Montana Boulder River

Best Fishing Times

The Boulder River typically fishes well between July and early August when river flows stay between 3,000 cfs and 600 cfs. River flows vary from year to year but early July through mid August are typical floating times.

The Fishing Experience

The Boulder River is best described as a half fishing, half white water raft trip. Anglers will revel in the fast action, pocket water type fishing. Primarily a dry fly river this fast water stream has numerous hatches including Golden Stones, Caddis, and several Mayfly species.

Boulder River Hatches

July Golden Stones – early July can boast some excellent dry fly and nymphing for good size trout. Size 6-8 flies offer some exciting action. Mayflies – July often has excellent number of Pale Morning Dun’s (PMDs). Caddis – much of July and early August have our annual summer Caddis. Size 12-16 X Caddis, Elk Hair Caddis, and small Pheasant tail droppers are most effective. Terrestrials – Hoppers and beetles are excellent options as the August heat sets in.