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22-acre lake in Muskoka District Municipality, Ontario. The lake tops out around 12 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. The season-by-season read for each species follows, from the map's own numbers.
Thompson Lake maps at 22 acres behind 0.8 miles of shoreline. The basin is a simple one (shoreline index 1.2) — close to a bowl, so the structure on the chart matters more than the bank. The whole water is littoral — nothing here runs deeper than ~15 ft, so it's all weed-and-bait territory. Call it 0.3 mi long by 0.2 mi wide at the broadest reach. Muskoka District Municipality claims this one. Henshaw Lake sits 1 mi south — the closest neighbouring chart.
Spring northern pike on Thompson Lake hold shallow, usually 2 to 8 ft. By summer they slide out to 4 to 12 ft, and by winter most fish are in 4 to 12 ft. The chart's best answer is Shallow bay flat — weed flat, 3 ft, prime for spring. Prime time lands in early morning and the evening. The summer box starts with a bucktail or a weedless spoon over cabbage.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (3 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 4 to 12 ft | dawn & dusk | Shoreline break (5 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 4 to 12 ft | midday & dawn | Shoreline break (5 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 4 to 12 ft | midday | Shallow bay flat (3 ft) | Tip-ups, Large jigging spoon |
Spring smallmouth bass on Thompson Lake hold shallow, usually 3 to 12 ft. Depth-wise the year is flat: 4 to 12 ft in summer, 4 to 12 ft once it turns cold. The chart's best answer is Shoreline break — drop-off, 5 ft, prime for winter. Prime time lands in early morning and the evening. The summer box starts with a drop shot (goby/minnow) or a ned rig.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | open water | Ned rig, Tube jig |
| Summer | 4 to 12 ft | dawn & dusk | Shoreline break (5 ft) | Drop shot (goby/minnow), Ned rig |
| Fall | 4 to 12 ft | midday & dawn | Shoreline break (5 ft) | Jerkbait, Blade bait |
| Winter | 4 to 12 ft | midday | Shoreline break (5 ft) | Blade bait, Hair jig |
Early season largemouth bass use the shallows, holding in 2 to 10 ft. Expect a summer slide to 4 to 12 ft, then a winter hold in 4 to 12 ft. Put Shallow bay flat first on the milk run — a weed flat near 3 ft that grades prime for spring. In summer the feeding windows fall in early morning and the evening. Tie on a texas-rigged 10" worm or a deep-diving crankbait and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Shallow bay flat (3 ft) | Spinnerbait, Chatterbait |
| Summer | 4 to 12 ft | dawn & dusk | Shoreline break (5 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 3 to 12 ft | midday & dawn | Shallow bay flat (3 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 4 to 12 ft | midday | Shoreline break (5 ft) | Blade bait, Jigging spoon |
Spring brown bullhead on Thompson Lake hold shallow, usually 2 to 8 ft. They move out to 3 to 12 ft in summer and finish the year down in 4 to 12 ft. Put Deep basin first on the milk run — a deep basin near 10 ft that grades prime for winter. The feeding windows run after dark and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | dusk & night | Shallow bay flat (3 ft) | |
| Summer | 3 to 12 ft | night & dusk | Shallow bay flat (3 ft) | |
| Fall | 4 to 12 ft | dusk | Deep basin (10 ft) | |
| Winter | 4 to 12 ft | midday | Deep basin (10 ft) |
The chart marks 4 structure features on Thompson Lake; the deepest is Deep basin at about 10 ft.
Access data: Geospatial Ontario - Fishing Access Points. Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for Ontario waters are set by the Ontario fishing regulations (FMZ summary) — and special regulations can apply to Thompson Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Thompson Lake is about 12 ft (4 m) deep 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.
Anglers target northern pike, smallmouth bass, largemouth bass, brown bullhead on Thompson Lake.
Shallow bay flat is the top-rated area: a weed flat in about 3 ft of water that rates prime for northern pike in spring. Scroll up to the map for the complete spot list by species and season.
For northern pike, 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.
Fishing on Thompson Lake is regulated by the Ontario fishing regulations (FMZ summary). Check the official Ontario regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Henshaw Lake 1 mi · Silver Lake 1 mi · Butterfly Lake 2 mi · Ada Lake 3 mi · Brandy Lake 3 mi · Medora Lake 4 mi · Concession Lake 4 mi · Harper L. 5 mi · Joseph River 5 mi · Lake Rosseau 5 mi · Bass Lake 5 mi · Barrett Lake 5 mi
See how Thompson Lake stacks up: best largemouth bass lakes in Ontario · best smallmouth bass lakes in Ontario · best northern pike lakes in Ontario · best brown bullhead lakes in Ontario
More water nearby: Muskoka District Municipality fishing maps (276 charts). Browse all Ontario fishing maps or see every water on DepthScout. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.