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Shared by DepthScout anglers. Exact spots stay private, always.
216-acre lake in Simcoe County, Ontario. The lake tops out around 3 ft. The depth picture is modeled, anchored to the true shoreline and the water's published max depth — a scouting aid, never a chart to run a boat by. The season-by-season read for each species follows, from the map's own numbers.
Drawn out, this is 217 acres of water rimmed by 5.6 miles of bank — one island included. With a shoreline index of 2.7, this water is all arms and coves — edge habitat well beyond its acreage. All of it is shallow-zone water — under ~15 ft across the entire basin, so the food chain has the run of the place. The basin spans about 1.2 mi end to end and 0.6 mi across at its widest. You'll find it in Simcoe County. Closest neighbour on DepthScout: Buck Lake, 1 mi west of here.
When the water first warms, walleye slide up into 1 to 3 ft. There's no big seasonal slide here — summer means 1 to 3 ft, winter 1 to 3 ft. If you only fish one area, make it Break off the point: a drop-off around 1 ft that scores prime in fall. In summer the feeding windows fall in the evening and early morning. Keep a crawler harness on bottom bouncer or a deep crankbait (trolled) rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 3 ft | dusk & dawn | Main-lake point (3 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 1 to 3 ft | dusk & dawn | Break off the point (1 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 1 to 3 ft | dusk & night | Break off the point (1 ft) | Jigging rap, Jig + big minnow |
| Winter | 1 to 3 ft | dusk & dawn | Deep basin (3 ft) | Jigging spoon + minnow head, Rattle bait |
When the water first warms, yellow perch slide up into 1 to 3 ft. There's no big seasonal slide here — summer means 1 to 3 ft, winter 1 to 3 ft. Start at Shallow bay flat. It's a weed flat holding about 3 ft of water and rates prime come spring. The feeding windows run early morning. Keep a drop-shot micro plastics or a small spoon tipped with worm rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 3 ft | midday & dawn | Shallow bay flat (3 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 1 to 3 ft | dawn | Deep basin (3 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 1 to 3 ft | midday | Deep basin (3 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 1 to 3 ft | midday & dawn | Deep basin (3 ft) | Tungsten jig + spikes, Rattle spoon (small) |
The spring pattern is a shallow one: northern pike in 1 to 3 ft. The depth story barely changes: 1 to 3 ft through summer, 1 to 3 ft in winter. The spot to know is Shallow bay flat, a weed flat in about 3 ft of water that rates prime for northern pike in spring. Plan around early morning and the evening in the warm months. Summer baits: a bucktail or a weedless spoon over cabbage gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 3 ft | midday & dawn | Shallow bay flat (3 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 1 to 3 ft | dawn & dusk | Shallow bay flat (3 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 1 to 3 ft | midday & dawn | Shallow bay flat (3 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 1 to 3 ft | midday | Shallow bay flat (3 ft) | Tip-ups, Large jigging spoon |
Start shallow in spring: largemouth bass sit in 1 to 3 ft that time of year. They don't go far with the seasons — 1 to 3 ft covers summer, 1 to 3 ft covers winter. Top water on the chart: Shallow bay flat, a weed flat in the 3 ft range, prime in spring. Fish it in early morning and the evening and you'll meet the bite. Throw a texas-rigged 10" worm or a deep-diving crankbait until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 3 ft | dawn & dusk | Shallow bay flat (3 ft) | Spinnerbait, Chatterbait |
| Summer | 1 to 3 ft | dawn & dusk | Shallow bay flat (3 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 1 to 3 ft | midday & dawn | Main-lake point (3 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 1 to 3 ft | midday | Break off the point (1 ft) | Blade bait, Jigging spoon |
Spring pumpkinseed on Grass Lake hold shallow, usually 1 to 3 ft. Depth-wise the year is flat: 1 to 3 ft in summer, 1 to 3 ft once it turns cold. Put Shallow bay flat first on the milk run — a weed flat near 3 ft that grades prime for spring. The feeding windows run the evening and early morning. The summer box starts with a micro tube or a sponge spider (fly).
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 3 ft | midday & dusk | Shallow bay flat (3 ft) | Micro jig under a float, Tiny beetle-spin |
| Summer | 1 to 3 ft | dusk & dawn | Shallow bay flat (3 ft) | Micro tube, Sponge spider (fly) |
| Fall | 1 to 3 ft | dusk & dawn | Shallow bay flat (3 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 1 to 3 ft | dawn | Shallow bay flat (3 ft) | Tungsten ice jig + plastic, Tiny spoon |
In spring, common carp run shallow here, mostly 1 to 3 ft. Summer keeps them at 1 to 3 ft, and they winter in 1 to 3 ft. Shallow bay flat is the standout, a weed flat at roughly 3 ft, rated prime for spring common carp. Time it for early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 3 ft | midday & dawn | Shallow bay flat (3 ft) | |
| Summer | 1 to 3 ft | dawn & dusk | Shallow bay flat (3 ft) | |
| Fall | 1 to 3 ft | midday | Shallow bay flat (3 ft) | |
| Winter | 1 to 3 ft | midday | Deep basin (3 ft) |
Count 6 structure marks on this chart. The deepest, Main-lake point, sits near 3 ft.
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 Grass Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Grass Lake is about 3 ft (1 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 walleye, yellow perch, northern pike, largemouth bass, pumpkinseed, common carp on Grass Lake.
Break off the point is the top-rated area: a drop-off in about 1 ft of water that rates prime for walleye in fall. The interactive chart above rates every spot for each species and season.
For walleye, the summer bite is best in the evening and 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 Grass 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.
Buck Lake 1 mi · Beaver Lake 2 mi · Sparrow Lake 3 mi · Long Lake 5 mi · Eastern L. 5 mi · Lake Couchiching 6 mi · Lake St. John 6 mi · Clearwater Lake 8 mi · Morrison Lake 8 mi · Kahshe Lake 8 mi · Mud Lake 8 mi · Dumbell Lake 9 mi
See how Grass Lake stacks up: best largemouth bass lakes in Ontario · best walleye lakes in Ontario · best northern pike lakes in Ontario · best yellow perch lakes in Ontario
More water nearby: Simcoe County fishing maps (31 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.