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158-acre lake in Thunder Bay District, Ontario. The lake tops out around 115 ft. The chart is a model: real shoreline, published maximum depth, interpolated in between. A planning tool, never a navigation product. What the data behind the map says about each species, season by season:
On the chart, Clamp Lake draws 159 acres inside 5.4 miles of shoreline. That shoreline is heavily fingered (development index 3.1) — bays, points and pockets everywhere, which multiplies the fishable edge. About 57% of the surface sits shallower than 15 ft on the modeled chart — that's the weed-and-bait zone. End to end it runs roughly 1 mi, about 0.8 mi across. The water lies in Thunder Bay District. Closest neighbour on DepthScout: Walkover Lake, 2 mi northwest of here.
Start shallow in spring: brook trout sit in 2 to 15 ft that time of year. Warm water sends them out to 10 to 30 ft; cold water stacks them in 3 to 20 ft. Top water on the chart: Shallow bay flat, a weed flat in the 6 ft range, good in spring. 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 | Shallow bay flat (6 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | open water | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | open water | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Shallow bay flat (6 ft) | Small jigging spoon, Tungsten jig + plastic |
Spring puts smallmouth bass in skinny water — 3 to 12 ft is the zone. As the season builds they drop to 10 to 30 ft, wintering in 20 to 45 ft. Summer smallmouth bass concentrate at Main-lake point, a prime-rated point around 29 ft. Warm-month bites cluster around early morning and the evening. A drop shot (goby/minnow) or a ned rig covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | open water | Ned rig, Tube jig |
| Summer | 10 to 30 ft | dawn & dusk | Main-lake point (29 ft) | Drop shot (goby/minnow), Ned rig |
| Fall | 8 to 25 ft | midday & dawn | Main-lake point (29 ft) | Jerkbait, Blade bait |
| Winter | 20 to 45 ft | midday | Break off the point (52 ft) | Blade bait, Hair jig |
Start shallow in spring: burbot sit in 25 to 70 ft that time of year. Summer pushes them deeper, 35 to 115 ft, and winter fish settle into 15 to 60 ft. The spot to know is Deep basin, a deep basin in about 98 ft of water that rates prime for burbot in summer. 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 | 25 to 70 ft | night & dusk | Break off the point (52 ft) | Glow jigging spoon + cut bait, Rattle bait (dark) |
| Summer | 35 to 115 ft chart-limited; documented 50 to 120 ft | night & midday | Deep basin (98 ft) | Heavy jig + cut bait |
| Fall | 30 to 80 ft | night & dusk | Break off the point (52 ft) | Glow spoon + minnow head, Blade bait (slow) |
| Winter | 15 to 60 ft | night & dusk | Break off the point (52 ft) | Glow tungsten + cut bait, Rattle spoon + minnow head |
6 pieces of structure are mapped here — Deep basin, around 98 ft, is the deepest of them.
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 Clamp Lake specifically, so confirm the current rules before you fish.
Check the official Ontario fishing regulations →
Clamp Lake is about 115 ft (35 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, smallmouth bass, burbot on Clamp Lake.
Deep basin is the top-rated area: a deep basin in about 98 ft of water that rates prime for burbot in summer. Scroll up to the map for the complete spot list by 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 Clamp 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.
Walkover Lake 2 mi · Castle Lake 2 mi · Snowshoe Lake 6 mi · Wabinosh Lake 8 mi · Inspiration Lake 9 mi · Jojo Lake 11 mi · Waweig Lake 11 mi · McLaurin Lake 12 mi · Mackenzie Lake 12 mi · Chimney Lake 12 mi · Clearwater Lake 13 mi · Blue Lake 14 mi
See how Clamp Lake stacks up: best smallmouth bass lakes in Ontario · best brook 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. 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.