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Fishing Spar Lake: what the data says
286-acre lake near Montana. The lake tops out around 200 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.
Lake Trout fishing at Spar Lake
Start shallow in spring: lake trout sit in 10 to 40 ft that time of year. Summer pushes them deeper, 50 to 120 ft, and winter fish settle into 20 to 80 ft. The spot to know is Main-lake point, a point in about 21 ft of water that rates prime for lake trout in spring. Plan around early morning in the warm months. A white tube jig (deep) or a magnum spoon on downrigger covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 50 to 120 ft | dawn | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Heavy casting spoon, Jigging rap over reefs |
| Winter | 20 to 80 ft | dawn | White tube jig, Airplane jig |
Kokanee fishing at Spar Lake
In spring, kokanee run shallow here, mostly 10 to 30 ft. Summer pushes them deeper, 30 to 70 ft, and winter fish settle into 20 to 80 ft. Deep basin is the standout, a deep basin at roughly 200 ft, rated good for spring kokanee. Best bite is early morning. 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 |
Brook Trout fishing at Spar Lake
Spring brook trout on Spar Lake hold shallow, usually 2 to 15 ft. By summer they slide out to 10 to 30 ft, and by winter most fish are in 3 to 20 ft. Back-bay flat is the standout, a weed flat at roughly 22 ft, rated good for winter brook trout. Plan around early morning and the evening in the warm months. A small spoon fished deep or a trolled lake-clear wobbler + worm covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Small jigging spoon, Tungsten jig + plastic |
Cutthroat Trout fishing at Spar Lake
Spring cutthroat trout on Spar Lake hold shallow, usually 3 to 15 ft. They move out to 10 to 35 ft in summer and finish the year down in 10 to 40 ft. The spot to know is Main-lake point, a point in about 21 ft of water that rates prime for cutthroat trout in fall. Plan around early morning and the evening in the warm months. Summer baits: a trolled spoon (small) or a inline spinner gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 15 ft | dawn & dusk | Inline spinner (silver/gold), Small spoon |
| Summer | 10 to 35 ft | dawn & dusk | Trolled spoon (small), Inline spinner |
| Fall | 5 to 25 ft | dawn & dusk | Casting spoon, Inline spinner |
| Winter | 10 to 40 ft | dawn | Small jigging spoon, Marabou jig |
Rainbow Trout fishing at Spar Lake
Start shallow in spring: rainbow trout sit in 5 to 20 ft that time of year. By summer they slide out to 8 to 30 ft, and by winter most fish are in 8 to 40 ft. The spot to know is Main-lake point, a point in about 21 ft of water that rates prime for rainbow trout in fall. Best bite is early morning and the evening. A dodger + spoon (deep troll) or a flutter spoon covers the summer program.
| 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) |
Notable structure
- Deep basin: deep basin, around 200 ft
- Break off the point: drop-off, around 160 ft
- Shallow bay flat: weed flat, around 23 ft
- Back-bay flat: weed flat, around 22 ft
- Main-lake point: point, around 21 ft
Common questions
How deep is Spar Lake?
Spar Lake is about 200 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 Spar Lake?
Anglers target rainbow trout, lake trout, brook trout, kokanee, cutthroat trout on Spar Lake.
Where is the best fishing spot on Spar Lake?
Main-lake point is the top-rated area: a point in about 21 ft of water that rates prime for cutthroat trout in fall. Open the map above to see every rated spot for each species and season.
When is the best time to fish Spar Lake?
For lake trout, 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
Bull Lake (Lincoln) · Savage Lake · Kilbrennan Lake · Loon Lake (Lincoln) · Vinal Lake · Little Loon Lake
See how Spar Lake stacks up: best rainbow trout lakes in Montana · best lake trout lakes in Montana · best brook trout lakes in Montana · best kokanee 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.