Fishing Season: Year round; some tributaries closed December 1-third week of May. Check regulations before fishing.

Bitterroot River - MT

Fishing Outlook & Conditions

Water Temp:

61

Blackfoot River Outfitters's Tip of the Week

Fall is arguably the best time of year on the Root. The mix of BWO, Mahogany Dun, and October Caddis hatches makes for incredible dry fly fishing. Focus on soft inside seams, tailouts, and woody structure.

Directions open in app

Map of Bitterroot River

Water Flow Data

Orvis-Endorsed guides nearby

Blackfoot River Outfitters
Blue Damsel Lodge
Montana Hunting and Fishing Adventures
Triple Creek Ranch

5-Day Outlook as of 9/25/26

The Bitterroot valley has reached fall, the weekend highs will be in the low 60s with a mix of sunshine and clouds. The overnight lows will be in the 30s. The rest of the week will warm up a bit with temps in the high 60s with a mix of sunshine and clouds.

Techniques & Tips as of 9/25/26

On sunny afternoons, fish a Hopper or October Caddis tight to the bank. You can add a dropper to those with a Duracell or Perdigon 2-3 feet below. When cloud cover moves in, switch immediately to a Mahogany Dun or BWO dry fly (size 16–20) and target the slow foam lines. Stripping streamers can also be effective. Throw a Sculpin, Olive/Yellow Dungeon, Sparkle Minnow along log jams and drop-offs to find some of those more aggressive fish.

Local Species Available Year round; some tributaries closed December 1-third week of May. Check regulations before fishing.

  • Fish Icon

    Trout - rainbows

  • Fish Icon

    browns and cutties - whitefish

Blackfoot River Outfitters's Recommended Fly Patterns

"Must-have" fly fishing patterns in descending order of importance:

Name: Colors: Size(s):
Stimulator N/A #10-14
Elk Wing Caddis N/A #12-16
Adam’s Purple Parachute N/A #12-14
Fly Formerly Known As Prince N/A #12-14
Bead Head Hare’s Ear Nymph N/A #12-16
Tunghead Soft Hackle Pheasant Tail N/A #14-18
TJ Hooker N/A #08-12
Sparkle Minnow N/A #04-08
Kreelex N/A #6

Stimulator

This attractor dry fly is great for imitating stoneflies and caddis.

3.99

Item #0928

Buy Now

Blackfoot River Outfitters's Recommended Gear

Description: About Bitterroot River

The panoramic mountains of the Selway-Bitterroot Wilderness towering above this river make for an unforgettable setting. The Bitterroot affords anglers over 80 miles of varied freestone trout water ranging from riffles and runs to undercuts and deadfalls. This river's largest fish often rise to dry flies even in non-hatch conditions. One of our guides claims that "If you catch a fish on the Bitterroot, you could have caught it with a dry fly!" This probably isn't far from the truth in light of our fishing dries here 90% of the time (often with an additional bead head dropper). Renowned hatches of stone and may flies are in full force by March, providing the state's best early season surface action and Bitterroot river fish tend to look up for the rest of the season. Expect to catch native westslope cutthroat, rainbows and browns on any outing.

Nearest Airport:

Missoula International Airport (MSO)

Hatches:

Terrestrials, BWO, Mahogany

Best Time to Fish:

All Day

Best Stretch:

Most of the river is looking good. Keep an eye out for potential jams and portages.

Best Access:

Multiple fishing access sites throughout the river.