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213-acre lake in Thunder Bay District, Ontario. The lake tops out around 39 ft. The depth chart comes from Ontario Ministry of Natural Resources and Forestry bathymetric survey data, so the contours are survey-derived rather than computer-modeled. The depth data here comes from the Ontario MNRF survey of 1982 (an MNRF lake survey). The season-by-season read for each species follows, from the map's own numbers.
Traced from the shoreline, Sunbeam Lake runs 215 acres with 3.6 miles of edge. Index 1.7 on the shoreline: a few honest points and pockets, nothing labyrinthine. The shallow band under 15 ft claims about 97% of the surface — that's where the groceries are. Figure 1 mi of water from one end to the other, 0.5 mi at the beam. The water lies in Thunder Bay District. The nearest mapped water is Canthook L., 2 mi to the northwest.
Start shallow in spring: lake trout sit in 10 to 39 ft that time of year. They don't go far with the seasons — 12 to 39 ft covers summer, 10 to 39 ft covers winter. The spot to know is Deep basin, a deep basin in about 33 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.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 39 ft chart-limited; documented 10 to 40 ft | dawn & dusk | Break off the point (7 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 12 to 39 ft chart-limited; documented 50 to 120 ft | dawn | Deep basin (33 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 8 to 39 ft chart-limited; documented 10 to 50 ft | dusk & dawn | Break off the point (7 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 10 to 39 ft chart-limited; documented 20 to 80 ft | dawn | Deep basin (33 ft) | White tube jig, Airplane jig |
Spring puts northern pike in skinny water — 2 to 8 ft is the zone. As the season builds they drop to 8 to 20 ft, wintering in 5 to 15 ft. Fall northern pike concentrate at Break off the point, a prime-rated drop-off around 7 ft. Warm-month bites cluster around early morning and the evening. A bucktail or a weedless spoon over cabbage covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (1 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Break off the point (7 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Break off the point (7 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Break off the point (7 ft) | Tip-ups, Large jigging spoon |
Start shallow in spring: burbot sit in 12 to 39 ft that time of year. They don't go far with the seasons — 12 to 39 ft covers summer, 10 to 39 ft covers winter. The spot to know is Deep basin, a deep basin in about 33 ft of water that rates prime for burbot in spring. Warm-month bites cluster around after dark and midday. Throw a heavy jig + cut bait until the fish tell you otherwise.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 12 to 39 ft chart-limited; documented 25 to 70 ft | night & dusk | Deep basin (33 ft) | Glow jigging spoon + cut bait, Rattle bait (dark) |
| Summer | 12 to 39 ft chart-limited; documented 50 to 120 ft | night & midday | Deep basin (33 ft) | Heavy jig + cut bait |
| Fall | 12 to 39 ft chart-limited; documented 30 to 80 ft | night & dusk | Deep basin (33 ft) | Glow spoon + minnow head, Blade bait (slow) |
| Winter | 10 to 39 ft chart-limited; documented 15 to 60 ft | night & dusk | Deep basin (33 ft) | Glow tungsten + cut bait, Rattle spoon + minnow head |
The chart marks 6 structure features on Sunbeam Lake; the deepest is Deep basin at about 33 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 Sunbeam Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Sunbeam Lake is about 39 ft (12 m) deep at its deepest point. The depth data here comes from the Ontario MNRF survey of 1982 (an MNRF lake survey).
Anglers target lake trout, northern pike, burbot on Sunbeam Lake.
Deep basin is the top-rated area: a deep basin in about 33 ft of water that rates prime for lake trout in summer. The map above holds the full rated-spot list for every species and season.
For lake trout, the summer bite is best in 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 Sunbeam 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.
Canthook L. 2 mi · Prelate Lake 3 mi · Yellowhammer Lake 3 mi · Little Addie Lake 3 mi · Sunbow Lake 4 mi · Reta Lake 5 mi · Icarus Lake 5 mi · Madalaine Lake 6 mi · Shaco Lake 6 mi · Granite River 6 mi · North Lake 6 mi · Rose Lake 6 mi
See how Sunbeam Lake stacks up: best northern pike lakes in Ontario · best lake trout lakes in Ontario · best burbot lakes in Ontario
More water nearby: Thunder Bay District fishing maps (662 charts). Browse all Ontario fishing maps. See every water on DepthScout. Bathymetry: published agency survey data. 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.