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25-acre lake near Québec. The lake tops out around 82 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.
Traced from the shoreline, Lac Grossin runs 25 acres with 0.9 miles of edge. A shoreline index of 1.2 says round and simple: fish relate to depth changes here, not shoreline features. Littoral water — the productive band under ~15 ft — makes up 5% of this chart. End to end it runs roughly 0.4 mi. You'll find it in La Jacques-Cartier MRC. For a second option, Lac Gavitt lies 1 mi west.
Carte de pêche interactive gratuite — Lac Grossin, Québec : courbes de profondeur issues de relevés bathymétriques réels jusqu'à 25 m (82 pi), et les meilleurs sites pour omble de fontaine, touladi, omble chevalier et plus. Les profondeurs proviennent de la Géobase des bathymétries de lac du Québec (MELCCFP) lorsque disponibles.
The spring pattern is a shallow one: brook trout in 2 to 15 ft. As the season builds they drop to 10 to 30 ft, wintering in 3 to 20 ft. Top water on the chart: Shallow bay flat, a feeding flat in the 12 ft range, good in spring. Time it for early morning and the evening. Summer baits: a small spoon fished deep or a trolled lake-clear wobbler + worm gets it done.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 2 to 15 ft | dawn & dusk | Shallow bay flat (12 ft) | Small inline spinner (gold), Tiny spoon |
| Été | 10 to 30 ft | dawn & dusk | open water | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Automne | 2 to 15 ft | midday & dawn | open water | Small spoon (orange), Spinner |
| Hiver | 3 to 20 ft | dawn | Shallow bay flat (12 ft) | Small jigging spoon, Tungsten jig + plastic |
The spring pattern is a shallow one: lake trout in 10 to 40 ft. Midsummer fish sit out in 25 to 82 ft before dropping to 20 to 80 ft for winter. The spot to know is Deep basin, a deep basin in about 82 ft of water that rates prime for lake trout in summer. Plan around early morning in the warm months. Summer baits: a white tube jig (deep) or a magnum spoon on downrigger gets it done.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 10 to 40 ft | dawn & dusk | open water | Casting spoon over shoals, Jerkbait (shallow) |
| Été | 25 to 82 ft | dawn | Deep basin (82 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Automne | 10 to 50 ft | dusk & dawn | open water | Heavy casting spoon, Jigging rap over reefs |
| Hiver | 20 to 80 ft | dawn | Deep basin (82 ft) | White tube jig, Airplane jig |
Come spring, look for arctic char tight to the bank in 4 to 15 ft. They move out to 20 to 60 ft in summer and finish the year down in 10 to 40 ft. If you only fish one area, make it Shallow bay flat: a feeding flat around 12 ft that scores good in spring. Best bite is early morning. A jigging spoon vertical or a tube jig (smelt) is the honest summer answer here.
| 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 | Deep basin (82 ft) | Jigging spoon vertical, Tube jig (smelt) |
| Automne | 8 to 30 ft | midday & dusk | open water | Casting spoon (orange/gold), Beadhead streamer |
| Hiver | 10 to 40 ft | midday & dawn | Deep basin (82 ft) | Jigging spoon (glow/silver), Tungsten jig + plastic |
Come spring, look for lake whitefish tight to the bank in 15 to 45 ft. They move out to 25 to 82 ft in summer and finish the year down in 25 to 70 ft. If you only fish one area, make it Deep basin: a deep basin around 82 ft that scores prime in summer. Best bite is early morning. A blade bait vertical or a small jigging spoon is the honest summer answer here.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 15 to 45 ft | midday & dawn | Back-bay flat (21 ft) | Small jig + waxworm, Blade bait (small) |
| Été | 25 to 82 ft | dawn | Deep basin (82 ft) | Blade bait vertical, Small jigging spoon |
| Automne | 8 to 30 ft | dusk | open water | Small spoon (gold), Jig + plastic larva |
| Hiver | 25 to 70 ft | midday & dawn | Deep basin (82 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
Come spring, look for cisco (lake herring) tight to the bank in 10 to 40 ft. They move out to 40 to 80 ft in summer and finish the year down in 20 to 60 ft. If you only fish one area, make it Deep basin: a deep basin around 82 ft that scores prime in summer. Best bite is early morning. A vertical flutter spoon (small) or a drop-shot micro plastic is the honest summer answer here.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 10 to 40 ft | dawn & dusk | Deep basin (82 ft) | Small silver spoon, Tiny swim jig (white) |
| Été | 40 to 80 ft | dawn | Deep basin (82 ft) | Vertical flutter spoon (small), Drop-shot micro plastic |
| Automne | 5 to 25 ft | dusk & dawn | open water | Small casting spoon, Inline spinner (silver) |
| Hiver | 20 to 60 ft | dawn | Deep basin (82 ft) | Small jigging spoon (glow/silver), Tungsten jig + minnow head |
Spring walleye on Lac Grossin hold shallow, usually 4 to 15 ft. By summer they slide out to 15 to 35 ft, and by winter most fish are in 20 to 40 ft. The chart's best answer is Back-bay flat — feeding flat, 21 ft, good for summer. Prime time lands in the evening and early morning. The summer box starts with a crawler harness on bottom bouncer or a deep crankbait (trolled).
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 4 to 15 ft | dusk & dawn | open water | 1/8 oz jig + minnow, Hair jig |
| Été | 15 to 35 ft | dusk & dawn | Back-bay flat (21 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Automne | 12 to 40 ft | dusk & night | open water | Jigging rap, Jig + big minnow |
| Hiver | 20 to 40 ft | dusk & dawn | Deep basin (82 ft) | Jigging spoon + minnow head, Rattle bait |
Lac Grossin also holds yellow perch (10 to 30 ft in summer), burbot (25 to 82 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Structure-wise the chart holds 3 features, led in depth by Deep basin at roughly 82 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 Grossin specifically, so confirm the current rules before you fish.
Check the official Québec fishing regulations →
Lac Grossin is about 82 ft (25 m) deep at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.
Lac Grossin atteint environ 25 m (82 pi) à son point le plus profond. Les profondeurs proviennent de relevés bathymétriques réels.
Anglers target brook trout, lake trout, arctic char, lake whitefish, cisco (lake herring), walleye, yellow perch, burbot on Lac Grossin. 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 82 ft of water that rates prime for lake trout in summer. The interactive chart above rates every spot for each species and season.
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 Grossin 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 Gavitt 1 mi · Lac des Mâles 2 mi · Lac Jonquart 2 mi · Lac Croche 2 mi · Lac Dion 3 mi · Lac Lonion 3 mi · Lac de la Bouteille 3 mi · Lac Coutra 3 mi · Lac McCormick 4 mi · Lac Nikik 4 mi · Lac Tourilli 5 mi · Lac Richard 5 mi
See how Lac Grossin stacks up: best walleye lakes in Québec · best yellow perch lakes in Québec · best lake trout lakes in Québec · best brook trout lakes in Québec
More water nearby: La Jacques-Cartier MRC fishing maps (43 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.