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423,998-acre section. Port Huron to Port Austin along the Thumb: summer walleye trolling in open water and lake trout on the deep edges. The lake tops out around 191 ft. The depth chart is built from real NOAA hydrographic survey soundings, so the humps, channels and drop-offs you see are measured, not guessed. Here's the year, species by species, as the scoring engine sees it.
The spring pattern is a shallow one: walleye in 4 to 15 ft. Midsummer fish sit out in 15 to 35 ft before dropping to 20 to 40 ft for winter. The spot to know is Sharp break, a drop-off in about 23 ft of water that rates prime for walleye in fall. Plan around the evening and early morning in the warm months. Summer baits: a crawler harness on bottom bouncer or a deep crankbait (trolled) gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | dusk & dawn | Rock reef (12 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 15 to 35 ft | dusk & dawn | Sharp break (23 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 12 to 40 ft | dusk & night | Sharp break (23 ft) | Jigging rap, Jig + big minnow |
| Winter | 20 to 40 ft | dusk & dawn | Sharp break (23 ft) | Jigging spoon + minnow head, Rattle bait |
Spring lake trout on Lake Huron - Thumb Shore hold shallow, usually 10 to 40 ft. By summer they slide out to 50 to 120 ft, and by winter most fish are in 20 to 80 ft. The chart's best answer is Harbor Beach breakwall — gravel shoal, 18 ft, prime for spring. Prime time lands in early morning. The summer box starts with a white tube jig (deep) or a magnum spoon on downrigger.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Harbor Beach breakwall (18 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 50 to 120 ft | dawn | Sharp break (52 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Harbor Beach breakwall (18 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 20 to 80 ft | dawn | Sharp break (23 ft) | White tube jig, Airplane jig |
Start shallow in spring: steelhead sit in 3 to 20 ft that time of year. Warm water sends them out to 5 to 45 ft; cold water stacks them in 4 to 15 ft. Top water on the chart: Deep hole, a deep basin in the 1 ft range, prime in summer. Fish it in early morning and the evening and you'll meet the bite. Throw an orange dodger + fly high in the column or a thin spoon off boards until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 20 ft | dawn & dusk | Harbor Beach breakwall (18 ft) | Small spoon or spinner at the mouths, Jig + waxworm under float |
| Summer | 5 to 45 ft | dawn & dusk | Deep hole (1 ft) | Orange dodger + fly high in the column, Thin spoon off boards |
| Fall | 5 to 30 ft | dawn & dusk | Sharp break (23 ft) | Spinner (silver/blue), Casting spoon |
| Winter | 4 to 15 ft | midday | Deep hole (1 ft) | Float jig (black/purple), Bead rig |
In spring, yellow perch run shallow here, mostly 3 to 12 ft. Midsummer fish sit out in 10 to 30 ft before dropping to 15 to 35 ft for winter. Summer yellow perch concentrate at Sharp break, a prime-rated drop-off around 23 ft. Fish it in early morning and you'll meet the bite. You won't need more than a drop-shot micro plastics or a small spoon tipped with worm most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Feeding flat (12 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 10 to 30 ft | dawn | Sharp break (23 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 12 to 35 ft | midday | Sharp break (23 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 15 to 35 ft | midday & dawn | Sharp break (23 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Early season smallmouth bass use the shallows, holding in 3 to 12 ft. Summer is a 10 to 30 ft game here, winter a 20 to 45 ft one. The chart's best answer is Rock reef — rock pile, 12 ft, prime for spring. Best bite is early morning and the evening. Tie on a drop shot (goby/minnow) or a ned rig and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Rock reef (12 ft) | Ned rig, Tube jig |
| Summer | 10 to 30 ft | dawn & dusk | Rock reef (12 ft) | Drop shot (goby/minnow), Ned rig |
| Fall | 8 to 25 ft | midday & dawn | Shoreline point (14 ft) | Jerkbait, Blade bait |
| Winter | 20 to 45 ft | midday | Sharp break (23 ft) | Blade bait, Hair jig |
In spring, lake whitefish run shallow here, mostly 15 to 45 ft. Summer pushes them deeper, 40 to 90 ft, and winter fish settle into 25 to 70 ft. Harbor Beach breakwall is the standout, a gravel shoal at roughly 18 ft, rated prime for spring lake whitefish. Time it for early morning. You won't need more than a blade bait vertical or a small jigging spoon most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 15 to 45 ft | midday & dawn | Harbor Beach breakwall (18 ft) | Small jig + waxworm, Blade bait (small) |
| Summer | 40 to 90 ft | dawn | Sharp break (52 ft) | Blade bait vertical, Small jigging spoon |
| Fall | 8 to 30 ft | dusk | Rock reef (12 ft) | Small spoon (gold), Jig + plastic larva |
| Winter | 25 to 70 ft | midday & dawn | Sharp break (52 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
Count 73 structure marks on this chart. The deepest, Deepest basin, sits near 177 ft.
Access data: Michigan DNR — Michigan Boating Access Sites. Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for Michigan waters are set by the Michigan DNR — and special regulations can apply to Lake Huron - Thumb Shore specifically, so confirm the current rules before you fish.
Check the official Michigan fishing regulations →
Lake Huron - Thumb Shore is about 191 ft (58 m) deep at its deepest point. The depth chart here comes from real NOAA hydrographic surveys, so the contours reflect measured depths.
Anglers target walleye, lake trout, steelhead, yellow perch, smallmouth bass, lake whitefish on Lake Huron - Thumb Shore.
Sharp break is the top-rated area: a drop-off in about 23 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 Lake Huron - Thumb Shore is regulated by the Michigan DNR. Check the official Michigan regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
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See how Lake Huron - Thumb Shore stacks up: best smallmouth bass lakes in Michigan · best walleye lakes in Michigan · best yellow perch lakes in Michigan · best steelhead lakes in Michigan
Browse all Michigan fishing maps or see every water on DepthScout. Bathymetry credit: NOAA hydrographic surveys. 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.