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153-acre lake in Sudbury District, Ontario. The lake tops out around 28 ft. These contours are modeled — built from the real shoreline and the water's maximum depth — so read them as a guide, never as navigation. What the data behind the map says about each species, season by season:
Traced from the shoreline, Marion L. runs 155 acres with 4.6 miles of edge, with a single island in the mix. That shoreline is heavily fingered (development index 2.6) — bays, points and pockets everywhere, which multiplies the fishable edge. 72% of the surface is littoral (under ~15 ft), per the model — cover, weeds and forage water. End to end it runs roughly 1.4 mi, about 0.5 mi across. The water lies in Sudbury District. Closest neighbour on DepthScout: Rushbrook Lake, 1 mi west of here.
Start shallow in spring: brook trout sit in 2 to 15 ft that time of year. Warm water sends them out to 8 to 28 ft; cold water stacks them in 3 to 20 ft. Top water on the chart: Deep basin, a deep basin in the 24 ft range, prime in summer. Fish it in early morning and the evening and you'll meet the bite. Throw a small spoon fished deep or a trolled lake-clear wobbler + worm until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (8 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 8 to 28 ft | dawn & dusk | Deep basin (24 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (8 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (13 ft) | Small jigging spoon, Tungsten jig + plastic |
Start shallow in spring: lake trout sit in 7 to 28 ft that time of year. They don't go far with the seasons — 8 to 28 ft covers summer, 7 to 28 ft covers winter. The spot to know is Deep basin, a deep basin in about 24 ft of water that rates prime for lake trout in summer. Warm-month bites cluster around early morning. Throw a white tube jig (deep) or a magnum spoon on downrigger until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 7 to 28 ft | dawn & dusk | Main-lake point (8 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 8 to 28 ft | dawn | Deep basin (24 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 6 to 28 ft | dusk & dawn | Main-lake point (8 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 7 to 28 ft | dawn | Deep basin (24 ft) | White tube jig, Airplane jig |
The spring pattern is a shallow one: splake in 5 to 25 ft. As the season builds they drop to 8 to 28 ft, wintering in 6 to 28 ft. Top water on the chart: Break off the point, a drop-off in the 13 ft range, prime in summer. Time it for early morning and the evening. Summer baits: a trolled spoon at the thermocline or a white tube jig (deep) gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | dawn & dusk | Main-lake point (8 ft) | Small casting spoon (gold/orange), Inline spinner |
| Summer | 8 to 28 ft | dawn & dusk | Break off the point (13 ft) | Trolled spoon at the thermocline, White tube jig (deep) |
| Fall | 8 to 28 ft | dawn & dusk | Main-lake point (8 ft) | Casting spoon, Jerkbait |
| Winter | 6 to 28 ft | dawn | Break off the point (13 ft) | Jigging spoon tipped with minnow head, Small white tube |
Spring yellow perch on Marion L. hold shallow, usually 3 to 12 ft. By summer they slide out to 8 to 28 ft, and by winter most fish are in 8 to 28 ft. The chart's best answer is Shallow bay flat — weed flat, 3 ft, prime for spring. Prime time lands in early morning. The summer box starts with a drop-shot micro plastics or a small spoon tipped with worm.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (3 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 8 to 28 ft | dawn | Deep basin (24 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 8 to 28 ft | midday | Deep basin (24 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 8 to 28 ft | midday & dawn | Deep basin (24 ft) | Tungsten jig + spikes, Rattle spoon (small) |
The chart marks 6 structure features on Marion L.; the deepest is Deep basin at about 24 ft.
Access data: Geospatial Ontario - Fishing Access Points. Confirm conditions and fees locally before you launch.
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 Marion L. specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Marion L. is about 28 ft (9 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 brook trout, lake trout, splake, yellow perch on Marion L..
Deep basin is the top-rated area: a deep basin in about 24 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 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 Marion L. 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.
Rushbrook Lake 1 mi · Charcoal Lake 1 mi · Georgia Lake 2 mi · Pibroch Lake 2 mi · Len Lake 3 mi · Lower Shakwa Lake 4 mi · S Lake 4 mi · Marguerite Lake 4 mi · Solski L. 35 4 mi · Shakwa Lake 5 mi · Tomasina Lake 6 mi · Bluewater Lake 6 mi
See how Marion L. stacks up: best yellow perch lakes in Ontario · best lake trout lakes in Ontario · best brook trout lakes in Ontario · best splake lakes in Ontario
More water nearby: Sudbury District fishing maps (868 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.