Fishing Season: Year Round (Prime: July 1 - August 1; Runoff: May 1 - June 15)

Gallatin River - MT

Fishing Outlook & Conditions

Water Temp:

39

Yellow Dog Flyfishing's Tip of the Week

Nymphing with pheasant tails and small stonefly nymphs has been the best way to catch fish. Perdigons have worked well too.

Directions open in app

Map of Gallatin River

Water Flow Data

Orvis-Endorsed guides nearby

Firehole Ranch
Madison Valley Ranch
Fins & Feathers
Long Outfitting

5-Day Outlook as of 12/3/25

Cold this week with some more favorable temperatures expected starting this week and carrying into next week.

Techniques & Tips as of 12/3/25

Nymph fishing will be the best option. Small black Stonefly nymphs or bwo nymphs. Black Streamers will be the second best option.

Local Species Available Year Round (Prime: July 1 - August 1; Runoff: May 1 - June 15)

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    Rainbow Trout

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    Brown Trout

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    Yellowstone Cutthroat Trout

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    Rocky Mountian Whitefish

Yellow Dog Flyfishing's Recommended Fly Patterns

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

Name: Colors: Size(s):
Bead Head Stonefly Peacock 12
Tunghead Pheasant Tail Jig Olive 16
Bubba's NBK Sculpin Natural 8-10
Bead Head Prince Black 12
Pat's Rubberleg Brown 10-14
BWO Comparadun Peacock 16
Bead Head Stonefly Brown 10
La Fontaine Sparkle Pupa Orange 6
Lite Brite Perdigon Purple 14

Bead Head Stonefly

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Yellow Dog Flyfishing's Recommended Gear

Description: About Gallatin River

The Gallatin River is a classic western freestone river. It begins its journey in the northwest corner of Yellowstone National Park, flows through the scenic Gallatin Canyon passing the town of Big Sky, and eventually into the Gallatin Valley where it meets the Madison and Jefferson Rivers to form the Missouri. The Gallatin is characterized by its beautiful surroundings, easy access for wade fishing and abundance of rainbow trout, brown trout, and Yellowstone cutthroat trout. The Gallatin offers year-round fishing opportunities and anglers can be successful with dries, nymphs, or streamers.

Nearest Airport:

Gallatin Field Airport (BZN), Bozeman, Montana

Hatches:

Midges

Best Time to Fish:

Mid Day

Best Stretch:

Canyon

Best Access:

Any of the turnouts throughout the Canyon.