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Fishing Little Therriault Lake: what the data says
18-acre lake near Montana. The lake tops out around 25 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.
Rainbow Trout fishing at Little Therriault Lake
Start shallow in spring: rainbow trout sit in 5 to 20 ft that time of year. By summer they slide out to 7 to 25 ft, and by winter most fish are in 5 to 25 ft. The spot to know is Break off the point, a drop-off in about 9 ft of water that rates prime for rainbow trout in winter. 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 | 7 to 25 ft | dawn & dusk | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 7 to 25 ft | dawn & dusk | Casting spoon, Jerkbait over shoals |
| Winter | 5 to 25 ft | dawn | Jigging spoon, Tube jig (white) |
Yellow Perch fishing at Little Therriault Lake
Spring yellow perch on Little Therriault Lake hold shallow, usually 3 to 12 ft. They move out to 8 to 25 ft in summer and finish the year down in 8 to 25 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 5 ft that scores prime in spring. Best bite is 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 | 8 to 25 ft | dawn | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 8 to 25 ft | midday | Jigging spoon (small), Perch rig / spreader |
| Winter | 8 to 25 ft | midday & dawn | Tungsten jig + spikes, Rattle spoon (small) |
Smallmouth Bass fishing at Little Therriault Lake
Spring smallmouth bass on Little Therriault Lake hold shallow, usually 3 to 12 ft. They move out to 8 to 25 ft in summer and finish the year down in 8 to 25 ft. If you only fish one area, make it Break off the point: a drop-off around 9 ft that scores prime in winter. 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 | 8 to 25 ft | dawn & dusk | Drop shot (goby/minnow), Ned rig |
| Fall | 8 to 25 ft | midday & dawn | Jerkbait, Blade bait |
| Winter | 8 to 25 ft | midday | Blade bait, Hair jig |
Notable structure
- Deep basin: deep basin, around 25 ft
- Break off the point: drop-off, around 9 ft
- Shallow bay flat: weed flat, around 5 ft
- Main-lake point: point, around 4 ft
Common questions
How deep is Little Therriault Lake?
Little Therriault Lake is about 25 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 Therriault Lake?
Anglers target smallmouth bass, rainbow trout, yellow perch on Little Therriault Lake.
Where is the best fishing spot on Little Therriault Lake?
Shallow bay flat is the top-rated area: a weed flat in about 5 ft of water that rates prime for yellow perch in spring. Open the map above to see every rated spot for each species and season.
When is the best time to fish Little Therriault Lake?
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
BIG THERRIAULT LAKE · Glen Lake · Long Lake (Lincoln) · Rock Lake · Frank Lake · Martin Lake (Lincoln)
See how Little Therriault Lake stacks up: 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.