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Fishing Little Bitterroot Lake: what the data says
2,900-acre lake near Marion. The lake tops out around 260 ft. The depth chart is built from real state fisheries GPS surveys, so the humps, channels and drop-offs you see are measured, not guessed. What follows comes from the same scoring engine that paints the spots above.
Kokanee fishing at Little Bitterroot Lake
Start shallow in spring: kokanee sit in 10 to 30 ft that time of year. By summer they slide out to 30 to 70 ft, and by winter most fish are in 20 to 80 ft. The spot to know is Offshore hump, a offshore hump in about 23 ft of water that rates prime for kokanee in winter. Plan around early morning in the warm months. Tie on a dodger + pink/orange squid on downrigger or a kokanee bug + corn and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 10 to 30 ft | dawn | Small dodger + squid (pink), Wedding-ring spinner + corn |
| Summer | 30 to 70 ft | dawn | Dodger + pink/orange squid on downrigger, Kokanee bug + corn |
| Fall | 5 to 40 ft | dawn | Dodger + squid (deeper red/purple), Small spoon |
| Winter | 20 to 80 ft | dawn | Small glow jig + corn or maggot, Tiny spoon |
Largemouth Bass fishing at Little Bitterroot Lake
Spring largemouth bass on Little Bitterroot Lake hold shallow, usually 2 to 10 ft. They move out to 8 to 20 ft in summer and finish the year down in 15 to 35 ft. The spot to know is Shallow bay flat, a weed flat in about 8 ft of water that rates prime for largemouth bass in spring. In summer the feeding windows fall in early morning and the evening. A texas-rigged 10" worm or a deep-diving crankbait covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Squarebill crankbait (shad), Spinnerbait |
| Winter | 15 to 35 ft | midday | Blade bait, Jigging spoon |
Yellow Perch fishing at Little Bitterroot Lake
In spring, yellow perch run shallow here, mostly 3 to 12 ft. They move out to 10 to 30 ft in summer and finish the year down in 15 to 35 ft. The spot to know is Shallow bay flat, a weed flat in about 8 ft of water that rates prime for yellow perch in spring. In summer the feeding windows fall in early morning. Tie on a drop-shot micro plastics or a small spoon tipped with worm and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 10 to 30 ft | dawn | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 12 to 35 ft | midday | Jigging spoon (small), Perch rig / spreader |
| Winter | 15 to 35 ft | midday & dawn | Tungsten jig + spikes, Rattle spoon (small) |
Rainbow Trout fishing at Little Bitterroot Lake
Spring rainbow trout on Little Bitterroot Lake hold shallow, usually 5 to 20 ft. They move out to 8 to 30 ft in summer and finish the year down in 8 to 40 ft. The spot to know is Main-lake point, a point in about 11 ft of water that rates prime for rainbow trout in spring. Plan around early morning and the evening in the warm months. Summer baits: a dodger + spoon (deep troll) or a flutter spoon gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Jigging spoon, Tube jig (white) |
Smallmouth Bass fishing at Little Bitterroot Lake
Spring smallmouth bass on Little Bitterroot Lake hold shallow, usually 3 to 12 ft. By summer they slide out to 10 to 30 ft, and by winter most fish are in 20 to 45 ft. If you only fish one area, make it Offshore hump: a offshore hump around 23 ft that scores prime in summer. In summer the feeding windows fall in early morning and the evening. Tie on a drop shot (goby/minnow) or a ned rig and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Ned rig, Tube jig |
| Summer | 10 to 30 ft | dawn & dusk | Drop shot (goby/minnow), Ned rig |
| Fall | 8 to 25 ft | midday & dawn | Jerkbait, Blade bait |
| Winter | 20 to 45 ft | midday | Blade bait, Hair jig |
Notable structure
- Deep basin: deep basin, around 260 ft
- Break off the point: drop-off, around 240 ft
- Feeding flat: feeding flat, around 72 ft
- Feeding flat: feeding flat, around 70 ft
- Offshore hump: offshore hump, around 23 ft
- Offshore hump: offshore hump, around 18 ft
- Back-bay flat: weed flat, around 16 ft
- Secondary point: point, around 13 ft
- Shoreline point: point, around 13 ft
- Shoreline point: point, around 12 ft
- Main-lake point: point, around 11 ft
- Shallow bay flat: weed flat, around 8 ft
Common questions
How deep is Little Bitterroot Lake?
Little Bitterroot Lake is about 260 ft at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.
What fish are in Little Bitterroot Lake?
Anglers target largemouth bass, smallmouth bass, rainbow trout, yellow perch, kokanee on Little Bitterroot Lake.
Where is the best fishing spot on Little Bitterroot Lake?
Shallow bay flat is the top-rated area: a weed flat in about 8 ft of water that rates prime for largemouth bass in spring. Open the map above to see every rated spot for each species and season.
When is the best time to fish Little Bitterroot Lake?
For kokanee, the summer bite is best in early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Nearby waters
Rogers Lake · Ashley Lake · Mcgregor Lake · Hubbart Reservoir · Sylvia Lake · Island Lake
See how Little Bitterroot Lake stacks up: best largemouth bass lakes in Montana · best smallmouth bass lakes in Montana · best rainbow trout lakes in Montana · best yellow perch lakes in Montana
Browse all Montana fishing maps or every water on DepthScout. Bathymetry credit: state fisheries survey programs. How we build these maps. For fishing guidance only, never navigation.