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Fishing Thompson Lake: what the data says
17-acre lake near Ontario. The lake tops out around 80 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. What follows comes from the same scoring engine that paints the spots above.
Rainbow Trout fishing at Thompson Lake
In spring, rainbow trout run shallow here, mostly 5 to 20 ft. They move out to 8 to 30 ft in summer and finish the year down in 8 to 40 ft. If you only fish one area, make it Break off the point: a drop-off around 36 ft that scores prime in winter. Best bite is early morning and the evening. 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) |
Brown Bullhead fishing at Thompson Lake
Start shallow in spring: brown bullhead sit in 2 to 8 ft that time of year. By summer they slide out to 3 to 12 ft, and by winter most fish are in 10 to 25 ft. The spot to know is Deep basin, a deep basin in about 68 ft of water that rates good for brown bullhead in winter. Plan around after dark and the evening in the warm months.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 8 ft | dusk & night | |
| Summer | 3 to 12 ft | night & dusk | |
| Fall | 5 to 15 ft | dusk | |
| Winter | 10 to 25 ft | midday |
Notable structure
- Deep basin: deep basin, around 68 ft
- Break off the point: drop-off, around 36 ft
- Main-lake point: point, around 20 ft
Common questions
How deep is Thompson Lake?
Thompson Lake is about 80 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 Thompson Lake?
Anglers target rainbow trout, brown bullhead on Thompson Lake.
Where is the best fishing spot on Thompson Lake?
Break off the point is the top-rated area: a drop-off in about 36 ft of water that rates prime for rainbow trout in winter. Open the map above to see every rated spot for each species and season.
When is the best time to fish Thompson 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
Philips Lake · Bond Lake · Lake Seneca · Wilcox Lake · St. George Lake · Mary Lake
See how Thompson Lake stacks up: best rainbow trout lakes in Ontario · best brown bullhead lakes in Ontario
Browse all Ontario fishing maps or every water on DepthScout. How we build these maps. For fishing guidance only, never navigation.