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Fishing Theriault Lake: what the data says
209-acre lake near Ontario. The lake tops out around 20 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. Here is how the season plays out for each species, straight from the data behind the map.
Walleye fishing at Theriault Lake
Spring walleye on Theriault Lake hold shallow, usually 4 to 15 ft. Summer pushes them deeper, 6 to 20 ft, and winter fish settle into 6 to 20 ft. The spot to know is Break off the point, a drop-off in about 9 ft of water that rates prime for walleye in fall. Best bite is the evening and early morning. Summer baits: a crawler harness on bottom bouncer or a deep crankbait (trolled) gets it done.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | 1/8 oz jig + minnow, Hair jig |
| Summer | 6 to 20 ft | dusk & dawn | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 6 to 20 ft | dusk & night | Jigging rap, Jig + big minnow |
| Winter | 6 to 20 ft | dusk & dawn | Jigging spoon + minnow head, Rattle bait |
Yellow Perch fishing at Theriault Lake
In spring, yellow perch run shallow here, mostly 3 to 12 ft. Summer pushes them deeper, 6 to 20 ft, and winter fish settle into 6 to 20 ft. Shallow bay flat is the standout, a weed flat at roughly 3 ft, rated prime for spring yellow perch. 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 | 6 to 20 ft | dawn | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 6 to 20 ft | midday | Jigging spoon (small), Perch rig / spreader |
| Winter | 6 to 20 ft | midday & dawn | Tungsten jig + spikes, Rattle spoon (small) |
Striped Bass fishing at Theriault Lake
Start shallow in spring: striped bass sit in 5 to 20 ft that time of year. Summer fish stay in 6 to 20 ft, and winter fish hold in 6 to 20 ft. If you only fish one area, make it Deep basin: a deep basin around 17 ft that scores prime in summer. In summer the feeding windows fall in early morning and the evening. A flutter spoon (deep) or a umbrella rig (trolled) covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Bucktail jig + trailer, Walking topwater (dawn) |
| Summer | 6 to 20 ft | dawn & dusk | Flutter spoon (deep), Umbrella rig (trolled) |
| Fall | 6 to 20 ft | dawn & dusk | Topwater walker, Jerkbait |
| Winter | 6 to 20 ft | midday | Alabama rig (slow), Flutter spoon |
Notable structure
- Deep basin: deep basin, around 17 ft
- Break off the point: drop-off, around 9 ft
- Main-lake point: point, around 8 ft
- Secondary point: point, around 8 ft
- Shallow bay flat: weed flat, around 3 ft
- Back-bay flat: weed flat, around 3 ft
Common questions
How deep is Theriault Lake?
Theriault Lake is about 20 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 Theriault Lake?
Anglers target walleye, striped bass, yellow perch on Theriault Lake.
Where is the best fishing spot on Theriault 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 Theriault 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
Sargesson Lake · Pine Lake · Jake Lake · Silver Lake · Dwyer Lake · Apple Lake
See how Theriault Lake stacks up: best walleye lakes in Ontario · best yellow perch lakes in Ontario
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