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22-acre lake near Québec. The lake tops out around 70 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 the data behind the map says about each species, season by season:
Lac Thomas maps at 22 acres behind 1.1 miles of shoreline. With a 1.7 development index there's bank structure worth casting at, in moderation. Littoral water — the productive band under ~15 ft — makes up 16% of this chart. Call it 0.5 mi long. Papineau MRC claims this one. Its nearest charted neighbour, Lac du Goglu, is 1 mi to the south.
Carte de pêche interactive gratuite — Lac Thomas, Québec : courbes de profondeur issues de relevés bathymétriques réels jusqu'à 21 m (70 pi), et les meilleurs sites pour touladi, truite arc-en-ciel, truite brune et plus. Les profondeurs proviennent de la Géobase des bathymétries de lac du Québec (MELCCFP) lorsque disponibles.
Come spring, look for lake trout tight to the bank in 10 to 40 ft. They move out to 21 to 70 ft in summer and finish the year down in 18 to 70 ft. If you only fish one area, make it Deep basin: a deep basin around 69 ft that scores prime in summer. Best bite is early morning. A white tube jig (deep) or a magnum spoon on downrigger is the honest summer answer here.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 10 to 40 ft | dawn & dusk | Shoreline break (22 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Été | 21 to 70 ft | dawn | Deep basin (69 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Automne | 10 to 50 ft | dusk & dawn | Shoreline break (22 ft) | Heavy casting spoon, Jigging rap over reefs |
| Hiver | 18 to 70 ft | dawn | Deep basin (69 ft) | White tube jig, Airplane jig |
Early season rainbow trout use the shallows, holding in 5 to 20 ft. Summer is an 8 to 30 ft game here, winter an 8 to 40 ft one. The chart's best answer is Shoreline break — drop-off, 22 ft, prime for winter. Best bite is early morning and the evening. Tie on a dodger + spoon (deep troll) or a flutter spoon and you're in the game.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 5 to 20 ft | dawn & dusk | Shoreline break (22 ft) | Inline spinner (silver), Small spoon |
| Été | 8 to 30 ft | dawn & dusk | Shoreline break (22 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Automne | 10 to 35 ft | dawn & dusk | Shoreline break (22 ft) | Casting spoon, Jerkbait over shoals |
| Hiver | 8 to 40 ft | dawn | Shoreline break (22 ft) | Jigging spoon, Tube jig (white) |
Spring puts brown trout in skinny water — 3 to 25 ft is the zone. As the season builds they drop to 25 to 60 ft, wintering in 5 to 35 ft. Summer brown trout concentrate at Shoreline break, a prime-rated drop-off around 22 ft. Warm-month bites cluster around after dark and early morning. A spoon at the thermocline or a deep stickbait (night) covers the summer program.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 3 to 25 ft | dawn & dusk | Shoreline break (22 ft) | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Été | 25 to 60 ft | night & dawn | Shoreline break (22 ft) | Spoon at the thermocline, Deep stickbait (night) |
| Automne | 5 to 30 ft | dusk & dawn | Shoreline break (22 ft) | Jerkbait over gravel, Casting spoon |
| Hiver | 5 to 35 ft | dawn | Shoreline break (22 ft) | Jigging spoon, Small stickbait (slow) |
Early season landlocked salmon use the shallows, holding in 1 to 15 ft. Summer is a 25 to 60 ft game here, winter a 10 to 40 ft one. The chart's best answer is Shoreline break — drop-off, 22 ft, prime for winter. Best bite is early morning and the evening. Tie on a dodger + streamer down deep or a thin spoon on lead core and you're in the game.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 1 to 15 ft | dawn & dusk | open water | Streamer flies (Grey Ghost) off boards, Thin spoon (Mooselook style) |
| Été | 25 to 60 ft | dawn & dusk | Shoreline break (22 ft) | Dodger + streamer down deep, Thin spoon on lead core |
| Automne | 5 to 30 ft | dawn & dusk | Shoreline break (22 ft) | Casting spoon at the mouths, Streamers |
| Hiver | 10 to 40 ft | dawn | Shoreline break (22 ft) | Small jigging spoon, Swedish pimple + smelt |
The spring pattern is a shallow one: arctic char in 4 to 15 ft. Midsummer fish sit out in 20 to 60 ft before dropping to 10 to 40 ft for winter. The spot to know is Shoreline break, a drop-off in about 22 ft of water that rates prime for arctic char in summer. Plan around early morning in the warm months. Summer baits: a jigging spoon vertical or a tube jig (smelt) gets it done.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 4 to 15 ft | midday & dawn | Shallow bay flat (12 ft) | Small casting spoon (silver/orange), Jerkbait (small) |
| Été | 20 to 60 ft | dawn | Shoreline break (22 ft) | Jigging spoon vertical, Tube jig (smelt) |
| Automne | 8 to 30 ft | midday & dusk | Shoreline break (22 ft) | Casting spoon (orange/gold), Beadhead streamer |
| Hiver | 10 to 40 ft | midday & dawn | Shoreline break (22 ft) | Jigging spoon (glow/silver), Tungsten jig + plastic |
The spring pattern is a shallow one: lake whitefish in 15 to 45 ft. Midsummer fish sit out in 21 to 70 ft before dropping to 25 to 70 ft for winter. The spot to know is Deep basin, a deep basin in about 69 ft of water that rates prime for lake whitefish in summer. Plan around early morning in the warm months. Summer baits: a blade bait vertical or a small jigging spoon gets it done.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 15 to 45 ft | midday & dawn | Shoreline break (22 ft) | Small jig + waxworm, Blade bait (small) |
| Été | 21 to 70 ft | dawn | Deep basin (69 ft) | Blade bait vertical, Small jigging spoon |
| Automne | 8 to 30 ft | dusk | Shoreline break (22 ft) | Small spoon (gold), Jig + plastic larva |
| Hiver | 25 to 70 ft | midday & dawn | Deep basin (69 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
Lac Thomas also holds walleye (15 to 35 ft in summer), yellow perch (10 to 30 ft in summer), northern pike (8 to 20 ft in summer), smallmouth bass (10 to 30 ft in summer), largemouth bass (8 to 20 ft in summer), rock bass (5 to 20 ft in summer), crappie (10 to 25 ft in summer), pumpkinseed (2 to 10 ft in summer), brown bullhead (3 to 12 ft in summer), channel catfish (8 to 25 ft in summer), burbot (21 to 70 ft in summer). Pick any of them on the map above for rated spots and bait picks.
The chart marks 4 structure features on Lac Thomas; the deepest is Deep basin at about 69 ft.
Season dates, license requirements, and size and bag limits for Québec waters are set by the Québec sport fishing rules (MELCCFP) — and special regulations can apply to Lac Thomas specifically, so confirm the current rules before you fish.
Check the official Québec fishing regulations →
Lac Thomas is about 70 ft (21 m) deep at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.
Lac Thomas atteint environ 21 m (70 pi) à son point le plus profond. Les profondeurs proviennent de relevés bathymétriques réels.
Anglers target lake trout, rainbow trout, brown trout, landlocked salmon, arctic char, lake whitefish, walleye, yellow perch, northern pike, smallmouth bass, largemouth bass, rock bass, crappie, pumpkinseed, brown bullhead, channel catfish, burbot on Lac Thomas. This species list is an informed estimate from Québec's provincial fish-range maps (bounded by each lake's depth and habitat), not a per-lake fish survey — Québec doesn't publish per-lake species records.
Deep basin is the top-rated area: a deep basin in about 69 ft of water that rates prime for lake trout in summer. Every other rated spot, per species and season, is on the map above.
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.
Fishing on Lac Thomas is regulated by the Québec sport fishing rules (MELCCFP). Check the official Québec regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Lac du Goglu 1 mi · Lac des Pins 1 mi · Lac en Fer à Cheval 1 mi · Lac Rocheux 2 mi · Lac Brûlé 2 mi · Lac Plat 2 mi · Lac des Écorces 2 mi · Lac du Rocher 3 mi · Lac des Bois 3 mi · Lac Frank 3 mi · Lac du Bihoreau 3 mi · Lac des Ibis 4 mi
See how Lac Thomas stacks up: best largemouth bass lakes in Québec · best smallmouth bass lakes in Québec · best walleye lakes in Québec · best northern pike lakes in Québec
More water nearby: Papineau MRC fishing maps (60 charts). Browse all Québec fishing maps or see every water on DepthScout. Bathymetry credit: state fisheries survey programs. 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.