Sign inSign up freeRecent catches at Thom Lake
Shared by DepthScout anglers. Exact spots stay private, always.
Fishing Thom Lake: what the data says
157-acre lake near Ontario. The lake tops out around 10 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. Here is how the season plays out for each species, straight from the data behind the map.
Walleye fishing at Thom Lake
In spring, walleye run shallow here, mostly 3 to 10 ft. Summer fish stay in 3 to 10 ft, and winter fish hold in 3 to 10 ft. Break off the point is the standout, a drop-off at roughly 9 ft, rated prime for fall walleye. Best bite is the evening and early morning. Tie on a crawler harness on bottom bouncer or a deep crankbait (trolled) and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 10 ft | dusk & dawn | 1/8 oz jig + minnow, Hair jig |
| Summer | 3 to 10 ft | dusk & dawn | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 3 to 10 ft | dusk & night | Jigging rap, Jig + big minnow |
| Winter | 3 to 10 ft | dusk & dawn | Jigging spoon + minnow head, Rattle bait |
Northern Pike fishing at Thom Lake
In spring, northern pike run shallow here, mostly 2 to 8 ft. They move out to 3 to 10 ft in summer and finish the year down in 3 to 10 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 3 ft that scores prime in spring. Best bite is early morning and the evening. Summer baits: a bucktail or a weedless spoon over cabbage gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | #5 inline spinner, Spoon (red/white) |
| Summer | 3 to 10 ft | dawn & dusk | Bucktail, Weedless spoon over cabbage |
| Fall | 3 to 10 ft | midday & dawn | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 3 to 10 ft | midday | Tip-ups, Large jigging spoon |
Yellow Perch fishing at Thom Lake
Spring yellow perch on Thom Lake hold shallow, usually 3 to 10 ft. Summer fish stay in 3 to 10 ft, and winter fish hold in 3 to 10 ft. The spot to know is Shallow bay flat, a weed flat in about 3 ft of water that rates prime for yellow perch in spring. In summer the feeding windows fall in early morning. Summer baits: a drop-shot micro plastics or a small spoon tipped with worm gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 10 ft | midday & dawn | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 3 to 10 ft | dawn | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 3 to 10 ft | midday | Jigging spoon (small), Perch rig / spreader |
| Winter | 3 to 10 ft | midday & dawn | Tungsten jig + spikes, Rattle spoon (small) |
Smallmouth Bass fishing at Thom Lake
Spring smallmouth bass on Thom Lake hold shallow, usually 3 to 10 ft. Summer fish stay in 3 to 10 ft, and winter fish hold in 3 to 10 ft. The spot to know is Main-lake point, a point in about 5 ft of water that rates prime for smallmouth bass in fall. Plan around early morning and the evening in the warm months. Summer baits: a drop shot (goby/minnow) or a ned rig gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 10 ft | dawn & dusk | Ned rig, Tube jig |
| Summer | 3 to 10 ft | dawn & dusk | Drop shot (goby/minnow), Ned rig |
| Fall | 3 to 10 ft | midday & dawn | Jerkbait, Blade bait |
| Winter | 3 to 10 ft | midday | Blade bait, Hair jig |
Notable structure
- Deep basin: deep basin, around 10 ft
- Break off the point: drop-off, around 9 ft
- Secondary point: point, around 6 ft
- Main-lake point: point, around 5 ft
- Shallow bay flat: weed flat, around 3 ft
- Back-bay flat: weed flat, around 2 ft
Common questions
How deep is Thom Lake?
Thom Lake is about 10 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 Thom Lake?
Anglers target smallmouth bass, walleye, northern pike, yellow perch on Thom Lake.
Where is the best fishing spot on Thom Lake?
Break off the point is the top-rated area: a drop-off in about 9 ft of water that rates prime for walleye in fall. Open the map above to see every rated spot for each species and season.
When is the best time to fish Thom Lake?
For walleye, the summer bite is best in the evening and 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
Oscar Lake · Powell Lake · Cooper Lake · South Moosehorn Lake · Bourinot Lake · Graveyard Lake
See how Thom Lake stacks up: best smallmouth bass lakes in Ontario · best walleye lakes in Ontario · best northern pike lakes in Ontario · best yellow perch lakes in Ontario
Browse all Ontario fishing maps or every water on DepthScout. Bathymetry credit: state fisheries survey programs. How we build these maps. For fishing guidance only, never navigation.