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Fishing Gallatin River: what the data says
Big Sky down the canyon to the Gallatin Valley. a classic freestone with wild rainbow, brown and cutthroat trout and mountain whitefish. The river tops out around 8 ft. The contours are modeled from the water's real shoreline and maximum depth. Treat them as a rough guide, and never use them for navigation. Here is how the season plays out for each species, straight from the data behind the map.
Rainbow Trout fishing at Gallatin River
Start shallow in spring: rainbow trout sit in 2 to 8 ft that time of year. Summer fish stay in 2 to 8 ft, and winter fish hold in 2 to 8 ft. Current seam (mile 8.7) is the standout, a current seam at roughly 4 ft, rated prime for spring rainbow trout. Plan around early morning and the evening in the warm months. A dodger + spoon (deep troll) or a flutter spoon covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 8 ft | dawn & dusk | Inline spinner (silver), Small spoon |
| Summer | 2 to 8 ft | dawn & dusk | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 2 to 8 ft | dawn & dusk | Casting spoon, Jerkbait over shoals |
| Winter | 2 to 8 ft | dawn | Jigging spoon, Tube jig (white) |
Brown Trout fishing at Gallatin River
In spring, brown trout run shallow here, mostly 1 to 8 ft. Summer fish stay in 2 to 8 ft, and winter fish hold in 1 to 8 ft. The spot to know is Current seam (mile 8.7), a current seam in about 4 ft of water that rates prime for brown trout in summer. In summer the feeding windows fall in after dark and early morning. Summer baits: a spoon at the thermocline or a deep stickbait (night) gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 1 to 8 ft | dawn & dusk | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 2 to 8 ft | night & dawn | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 1 to 8 ft | dusk & dawn | Jerkbait over gravel, Casting spoon |
| Winter | 1 to 8 ft | dawn | Jigging spoon, Small stickbait (slow) |
Cutthroat Trout fishing at Gallatin River
Spring cutthroat trout on Gallatin River hold shallow, usually 2 to 8 ft. Summer fish stay in 2 to 8 ft, and winter fish hold in 2 to 8 ft. Current seam (mile 8.7) is the standout, a current seam at roughly 4 ft, rated prime for spring cutthroat trout. Best bite is early morning and the evening. A trolled spoon (small) or a inline spinner covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 8 ft | dawn & dusk | Inline spinner (silver/gold), Small spoon |
| Summer | 2 to 8 ft | dawn & dusk | Trolled spoon (small), Inline spinner |
| Fall | 2 to 8 ft | dawn & dusk | Casting spoon, Inline spinner |
| Winter | 2 to 8 ft | dawn | Small jigging spoon, Marabou jig |
Lake Whitefish fishing at Gallatin River
Spring lake whitefish on Gallatin River hold shallow, usually 2 to 8 ft. Summer fish stay in 2 to 8 ft, and winter fish hold in 2 to 8 ft. Riffle & run (mile 12.4) is the standout, a rock pile at roughly 3 ft, rated prime for fall lake whitefish. Best bite is early morning. Summer baits: a blade bait vertical or a small jigging spoon gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Small jig + waxworm, Blade bait (small) |
| Summer | 2 to 8 ft | dawn | Blade bait vertical, Small jigging spoon |
| Fall | 2 to 8 ft | dusk | Small spoon (gold), Jig + plastic larva |
| Winter | 2 to 8 ft | midday & dawn | Jigging spoon + bead chain, Tungsten jig + waxie |
Notable structure
- Dam tailrace: dam tailrace, around 7 ft
- Dam tailrace: dam tailrace, around 7 ft
- Lowhead weir tailrace: dam tailrace, around 7 ft
- Outside-bend hole (mile 0.6): creek channel, around 6 ft
- Outside-bend hole (mile 2.8): creek channel, around 6 ft
- Outside-bend hole (mile 4.7): creek channel, around 6 ft
- Outside-bend hole (mile 6.8): creek channel, around 6 ft
- Outside-bend hole (mile 10.5): creek channel, around 6 ft
- Outside-bend hole (mile 14.3): creek channel, around 6 ft
- Outside-bend hole (mile 19.5): creek channel, around 6 ft
- Outside-bend hole (mile 21.4): creek channel, around 6 ft
- Outside-bend hole (mile 28.5): creek channel, around 6 ft
- Outside-bend hole (mile 40.3): creek channel, around 6 ft
- Outside-bend hole (mile 42.2): creek channel, around 6 ft
Common questions
How deep is Gallatin River?
Gallatin River is about 8 ft at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
What fish are in Gallatin River?
Anglers target rainbow trout, brown trout, lake whitefish, cutthroat trout on Gallatin River.
Where is the best fishing spot on Gallatin River?
Current seam (mile 8.7) is the top-rated area: a current seam in about 4 ft of water that rates prime for rainbow trout in spring. Open the map above to see every rated spot for each species and season.
When is the best time to fish Gallatin River?
For rainbow trout, the summer bite is best in early morning and the evening. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Nearby waters
Dailey Lake · Madison River · Quake Lake · Hebgen Lake · Upper Branham Lake · Lower Branham Lake
See how Gallatin River stacks up: best rainbow trout lakes in Montana · best brown trout lakes in Montana · best lake whitefish lakes in Montana · best cutthroat trout lakes in Montana
Browse all Montana fishing maps or every water on DepthScout. How we build these maps. For fishing guidance only, never navigation.