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106-acre lake near Québec. The lake tops out around 20 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. Below is the species-by-species picture, pulled from the same data the map uses.
Drawn out, this is 106 acres of water rimmed by 1.6 miles of bank. Nearly circular (index 1.1), so the story is the bottom, not the bank. About 78% of the surface sits shallower than 15 ft — that's the weed-and-bait zone. The basin spans about 0.6 mi end to end and 0.4 mi across at its widest. The water lies in Rimouski-Neigette MRC. For a second option, Lac du Serpent lies 2 mi south.
Carte de pêche interactive gratuite — Lac du Castor, Québec : courbes de profondeur issues de relevés bathymétriques réels jusqu'à 6 m (20 pi), et les meilleurs sites pour omble de fontaine, ouananiche, perchaude et plus. Les profondeurs proviennent de la Géobase des bathymétries de lac du Québec (MELCCFP) lorsque disponibles.
In spring, brook trout run shallow here, mostly 2 to 15 ft. Midsummer fish sit out in 6 to 20 ft before dropping to 3 to 20 ft for winter. Summer brook trout concentrate at Deep basin, a prime-rated deep basin around 20 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a small spoon fished deep or a trolled lake-clear wobbler + worm most summer days.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 2 to 15 ft | dawn & dusk | Main-lake point (3 ft) | Small inline spinner (gold), Tiny spoon |
| Été | 6 to 20 ft | dawn & dusk | Deep basin (20 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Automne | 2 to 15 ft | midday & dawn | Main-lake point (3 ft) | Small spoon (orange), Spinner |
| Hiver | 3 to 20 ft | dawn | Deep basin (20 ft) | Small jigging spoon, Tungsten jig + plastic |
Spring puts landlocked salmon in skinny water — 1 to 15 ft is the zone. Warm water sends them out to 6 to 20 ft; cold water stacks them in 5 to 20 ft. Deep basin is the standout, a deep basin at roughly 20 ft, rated prime for summer landlocked salmon. Plan around early morning and the evening in the warm months. A dodger + streamer down deep or a thin spoon on lead core covers the summer program.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 1 to 15 ft | dawn & dusk | Main-lake point (3 ft) | Streamer flies (Grey Ghost) off boards, Thin spoon (Mooselook style) |
| Été | 6 to 20 ft | dawn & dusk | Deep basin (20 ft) | Dodger + streamer down deep, Thin spoon on lead core |
| Automne | 3 to 20 ft | dawn & dusk | Main-lake point (3 ft) | Casting spoon at the mouths, Streamers |
| Hiver | 5 to 20 ft | dawn | Deep basin (20 ft) | Small jigging spoon, Swedish pimple + smelt |
Come spring, look for yellow perch tight to the bank in 3 to 12 ft. Expect a summer slide to 6 to 20 ft, then a winter hold in 6 to 20 ft. Start at Deep basin. It's a deep basin holding about 20 ft of water and rates prime come fall. Prime time lands in early morning. A drop-shot micro plastics or a small spoon tipped with worm is the honest summer answer here.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 3 to 12 ft | midday & dawn | Shallow bay flat (2 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Été | 6 to 20 ft | dawn | Deep basin (20 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Automne | 6 to 20 ft | midday | Deep basin (20 ft) | Jigging spoon (small), Perch rig / spreader |
| Hiver | 6 to 20 ft | midday & dawn | Deep basin (20 ft) | Tungsten jig + spikes, Rattle spoon (small) |
In spring, brown bullhead run shallow here, mostly 2 to 8 ft. Summer pushes them deeper, 3 to 12 ft, and winter fish settle into 6 to 20 ft. Deep basin is the standout, a deep basin at roughly 20 ft, rated prime for winter brown bullhead. Time it for after dark and the evening.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 2 to 8 ft | dusk & night | Shallow bay flat (2 ft) | |
| Été | 3 to 12 ft | night & dusk | Shallow bay flat (2 ft) | |
| Automne | 5 to 15 ft | dusk | Shallow bay flat (2 ft) | |
| Hiver | 6 to 20 ft | midday | Deep basin (20 ft) |
Structure-wise the chart holds 5 features, led in depth by Deep basin at roughly 20 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 du Castor specifically, so confirm the current rules before you fish.
Check the official Québec fishing regulations →
Lac du Castor is about 20 ft (6 m) deep at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.
Lac du Castor atteint environ 6 m (20 pi) à son point le plus profond. Les profondeurs proviennent de relevés bathymétriques réels.
Anglers target brook trout, landlocked salmon, yellow perch, brown bullhead on Lac du Castor. 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 20 ft of water that rates prime for landlocked salmon in summer. Every other rated spot, per species and season, is on the map above.
For brook 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.
Fishing on Lac du Castor 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 Serpent 2 mi · Lac Saint-Jean 2 mi · Lac du Canard 3 mi · Lac Huguette 4 mi · Lac Blanc 4 mi · Lac de l'Épinette Noire 4 mi · Lac des Échos 5 mi · Lac Rimouski 6 mi · Lac Côté 7 mi · Lac à John 8 mi · Lac du Cerf 9 mi · Lac Huron 9 mi
See how Lac du Castor stacks up: best yellow perch lakes in Québec · best brook trout lakes in Québec · best landlocked salmon lakes in Québec · best brown bullhead lakes in Québec
More water nearby: Rimouski-Neigette MRC fishing maps (26 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.