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Rating depth structure for northern pike.
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10,214-acre lake near ᑯᐦᑯᒥᓈᓂᕽ Grandmother's Bay. The lake tops out around 130 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. Species by species, here's what the data says the year looks like.
The drawn water covers 10,199 acres wrapped in 154.2 miles of bank, with 78 islands in the mix. With a shoreline index of 10.9, this water is all arms and coves — edge habitat well beyond its acreage. Roughly 63% of the water is 15 ft or less as modeled, the band where the food chain lives. Call it 25 mi long by 4.5 mi wide at the broadest reach. Division No. 18 claims this one. Its nearest charted neighbour, Middle Foster Lake, is 9 mi to the north.
Early season burbot use the shallows, holding in 25 to 70 ft. Summer is a 50 to 120 ft game here, winter a 15 to 60 ft one. The chart's best answer is Deep basin — deep basin, 111 ft, prime for summer. Best bite is after dark and midday. Tie on a heavy jig + cut bait and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 25 to 70 ft | night & dusk | Break off the point (59 ft) | Glow jigging spoon + cut bait, Rattle bait (dark) |
| Summer | 50 to 120 ft | night & midday | Deep basin (111 ft) | Heavy jig + cut bait |
| Fall | 30 to 80 ft | night & dusk | Break off the point (59 ft) | Glow spoon + minnow head, Blade bait (slow) |
| Winter | 15 to 60 ft | night & dusk | Rock reef (5 ft) | Glow tungsten + cut bait, Rattle spoon + minnow head |
Spring puts cisco (lake herring) in skinny water — 10 to 40 ft is the zone. Warm water sends them out to 40 to 80 ft; cold water stacks them in 20 to 60 ft. Rock reef is the standout, a rock pile at roughly 5 ft, rated prime for fall cisco (lake herring). Plan around early morning in the warm months. A vertical flutter spoon (small) or a drop-shot micro plastic covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Sharp break (33 ft) | Small silver spoon, Tiny swim jig (white) |
| Summer | 40 to 80 ft | dawn | Break off the point (59 ft) | Vertical flutter spoon (small), Drop-shot micro plastic |
| Fall | 5 to 25 ft | dusk & dawn | Rock reef (5 ft) | Small casting spoon, Inline spinner (silver) |
| Winter | 20 to 60 ft | dawn | Break off the point (59 ft) | Small jigging spoon (glow/silver), Tungsten jig + minnow head |
Early season lake trout use the shallows, holding in 10 to 40 ft. Summer is a 50 to 120 ft game here, winter a 20 to 80 ft one. The chart's best answer is Deep basin — deep basin, 111 ft, prime for summer. Best bite is early morning. Tie on a white tube jig (deep) or a magnum spoon on downrigger and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Main-lake point (33 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 50 to 120 ft | dawn | Deep basin (111 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Main-lake point (33 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 20 to 80 ft | dawn | Break off the point (59 ft) | White tube jig, Airplane jig |
Spring puts lake whitefish in skinny water — 15 to 45 ft is the zone. Warm water sends them out to 40 to 90 ft; cold water stacks them in 25 to 70 ft. Rock reef is the standout, a rock pile at roughly 5 ft, rated prime for fall lake whitefish. Plan around early morning in the warm months. A blade bait vertical or a small jigging spoon covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 15 to 45 ft | midday & dawn | Sharp break (33 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 40 to 90 ft | dawn | Break off the point (59 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Rock reef (5 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 25 to 70 ft | midday & dawn | Break off the point (59 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
Spring northern pike on Lower Foster Lake hold shallow, usually 2 to 8 ft. By summer they slide out to 8 to 20 ft, and by winter most fish are in 5 to 15 ft. The chart's best answer is Shallow bay flat — weed flat, 6 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 (6 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Shallow bay flat (6 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Shallow bay flat (6 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Shallow bay flat (6 ft) | Tip-ups, Large jigging spoon |
Spring puts yellow perch in skinny water — 3 to 12 ft is the zone. As the season builds they drop to 10 to 30 ft, wintering in 15 to 35 ft. Spring yellow perch concentrate at Shallow bay flat, a prime-rated weed flat around 6 ft. Warm-month bites cluster around early morning. A drop-shot micro plastics or a small spoon tipped with worm covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (6 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 10 to 30 ft | dawn | Sharp break (25 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 12 to 35 ft | midday | Sharp break (33 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 15 to 35 ft | midday & dawn | Sharp break (33 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Lower Foster Lake carries 16 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 111 ft down.
Season dates, license requirements, and size and bag limits for Saskatchewan waters are set by the Saskatchewan anglers' guide — and special regulations can apply to Lower Foster Lake specifically, so confirm the current rules before you fish.
Check the official Saskatchewan fishing regulations →
Lower Foster Lake is about 130 ft (40 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 burbot, cisco (lake herring), lake trout, lake whitefish, northern pike, yellow perch on Lower Foster Lake.
Deep basin is the top-rated area: a deep basin in about 111 ft of water that rates prime for burbot in summer. Every other rated spot, per species and season, is on the map above.
For burbot, the summer bite is best in after dark and midday. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Lower Foster Lake is regulated by the Saskatchewan anglers' guide. Check the official Saskatchewan regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Middle Foster Lake 9 mi · Zimmer Lake 45 mi · McDonald Lake 47 mi · Key Lake 49 mi · Yew Lake 52 mi · David Lake 55 mi · McMillan Lake 56 mi · Jojay Lake 57 mi · Feldspar Lake 60 mi · Slushy Lake 60 mi · Broeder Lake 60 mi · Berna Lake 60 mi
See how Lower Foster Lake stacks up: best northern pike lakes in Saskatchewan · best yellow perch lakes in Saskatchewan · best lake trout lakes in Saskatchewan · best lake whitefish lakes in Saskatchewan
More water nearby: Division No. 18 fishing maps (166 charts). Browse all Saskatchewan 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.