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118-acre reservoir near Spotswood. The lake tops out around 12 ft. The depth chart is built from real state fisheries GPS surveys, so the humps, channels and drop-offs you see are measured, not guessed. Every species below gets its seasonal read from the same numbers driving the chart.
The outline encloses 132 acres, worked by 3.9 miles of shoreline. A development index of 2.4 means a maze of bays and points: far more casting targets than a round bowl of the same size. Nothing on this chart breaks 15 ft, which makes the whole surface littoral: weeds, bait and ambush cover everywhere. End to end it runs roughly 0.9 mi, about 0.5 mi across. It sits in Middlesex County. If the bite dies, South River is 3 mi to the north.
When the water first warms, largemouth bass slide up into 2 to 10 ft. Summer is a 4 to 12 ft game here, winter a 4 to 12 ft one. Start at Shallow bay flat. It's a weed flat holding about 2 ft of water and rates prime come spring. The feeding windows run early morning and the evening. Keep a texas-rigged 10" worm or a deep-diving crankbait rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Shallow bay flat (2 ft) | Spinnerbait, Chatterbait |
| Summer | 4 to 12 ft | dawn & dusk | Break off the point (4 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 3 to 12 ft | midday & dawn | Secondary point (6 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 4 to 12 ft | midday | Break off the point (4 ft) | Blade bait, Jigging spoon |
When the water first warms, bluegill slide up into 1 to 6 ft. By summer they slide out to 3 to 12 ft, and by winter most fish are in 4 to 12 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 2 ft that scores prime in spring. In summer the feeding windows fall in early morning and the evening. Keep a small sponge spider (fly) or a micro tube jig rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | Shallow bay flat (2 ft) | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 3 to 12 ft | dawn & dusk | Back-bay flat (3 ft) | Small sponge spider (fly), Micro tube jig |
| Fall | 4 to 12 ft | midday | Break off the point (4 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 4 to 12 ft | midday | Deep basin (12 ft) | Tungsten ice jig + plastic, Tiny spoon |
Count 6 structure marks on this chart. The deepest, Deep basin, sits near 12 ft.
Season dates, license requirements, and size and bag limits for New Jersey waters are set by the New Jersey Fish & Wildlife — and special regulations can apply to Duhernal Lake specifically, so confirm the current rules before you fish.
Check the official New Jersey fishing regulations →
Duhernal Lake is about 12 ft (4 m) deep at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.
Anglers target largemouth bass, bluegill on Duhernal Lake.
Shallow bay flat is the top-rated area: a weed flat in about 2 ft of water that rates prime for largemouth bass in spring. The map above holds the full rated-spot list for every species and season.
For largemouth bass, 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 Duhernal Lake is regulated by the New Jersey Fish & Wildlife. Check the official New Jersey regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
South River 3 mi · East Brunswick Community Park Lake 4 mi · Lake Topanemus 10 mi · Etra Lake 12 mi · Raritan River 13 mi · Mercer County Park Lake 17 mi · Echo Lake 19 mi · Lower Bay 20 mi, NY · False Hook Channel 21 mi, NY · Deal Lake 22 mi · Weequahic Lake 23 mi · Coney Island Channel 23 mi, NY
See how Duhernal Lake stacks up: best largemouth bass lakes in New Jersey · best bluegill lakes in New Jersey
Browse all New Jersey fishing maps or see every water on DepthScout. Bathymetry credit: state fisheries survey programs. 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.