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199-acre lake near Barnstead. NH GRANIT / NH Fish & Game survey water. The lake tops out around 5 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. What the data behind the map says about each species, season by season:
Drawn out, this is 199 acres of water rimmed by 2.8 miles of bank. At index 1.4 the outline is almost a bowl — read the depth changes, not the shoreline. All of it is shallow-zone water — under ~15 ft across the entire basin, so the food chain has the run of the place. Call it 1.3 mi long by 0.4 mi wide at the broadest reach. You'll find it in Belknap County. The nearest mapped water is Halfmoon Lake, 1 mi to the northeast.
The spring pattern is a shallow one: largemouth bass in 1 to 5 ft. The depth story barely changes: 2 to 5 ft through summer, 2 to 5 ft in winter. The spot to know is Shallow bay flat, a weed flat in about 3 ft of water that rates prime for largemouth bass in spring. Plan around early morning and the evening in the warm months. Summer baits: a texas-rigged 10" worm or a deep-diving crankbait gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 5 ft | dawn & dusk | Shallow bay flat (3 ft) | Spinnerbait, Chatterbait |
| Summer | 2 to 5 ft | dawn & dusk | Shallow bay flat (3 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 1 to 5 ft | midday & dawn | Main-lake point (3 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 2 to 5 ft | midday | Break off the point (2 ft) | Blade bait, Jigging spoon |
Come spring, look for yellow perch tight to the bank in 1 to 5 ft. Through summer count on 2 to 5 ft; the winter hold is 2 to 5 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 3 ft that scores prime in spring. Best bite is early morning. A drop-shot micro plastics or a small spoon tipped with worm is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 5 ft | midday & dawn | Shallow bay flat (3 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 2 to 5 ft | dawn | Deep basin (5 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 2 to 5 ft | midday | Deep basin (5 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 2 to 5 ft | midday & dawn | Deep basin (5 ft) | Tungsten jig + spikes, Rattle spoon (small) |
When the water first warms, chain pickerel slide up into 1 to 5 ft. There's no big seasonal slide here — summer means 1 to 5 ft, winter 1 to 5 ft. Start at Shallow bay flat. It's a weed flat holding about 3 ft of water and rates prime come spring. The feeding windows run early morning and the evening. Keep a weedless spoon + trailer or a buzzbait rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 5 ft | midday & dawn | Shallow bay flat (3 ft) | Inline spinner (silver), Small spoon (red/white) |
| Summer | 1 to 5 ft | dawn & dusk | Shallow bay flat (3 ft) | Weedless spoon + trailer, Buzzbait |
| Fall | 1 to 5 ft | midday & dawn | Shallow bay flat (3 ft) | Jerkbait along weed edges, Spinnerbait |
| Winter | 1 to 5 ft | dawn | Shallow bay flat (3 ft) | Jigging spoon (through ice) |
In spring, bluegill run shallow here, mostly 1 to 5 ft. Summer keeps them at 1 to 5 ft, and they winter in 2 to 5 ft. Spring bluegill concentrate at Shallow bay flat, a prime-rated weed flat around 3 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a small sponge spider (fly) or a micro tube jig most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 5 ft | midday & dusk | Shallow bay flat (3 ft) | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 1 to 5 ft | dawn & dusk | Shallow bay flat (3 ft) | Small sponge spider (fly), Micro tube jig |
| Fall | 2 to 5 ft | midday | Shallow bay flat (3 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 2 to 5 ft | midday | Deep basin (5 ft) | Tungsten ice jig + plastic, Tiny spoon |
In spring, white perch run shallow here, mostly 1 to 5 ft. Summer keeps them at 2 to 5 ft, and they winter in 2 to 5 ft. Deep basin is the standout, a deep basin at roughly 5 ft, rated prime for summer white perch. Time it for early morning. You won't need more than a small spinner rig drifted or a 1/8 oz jigging spoon most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 5 ft | dusk | Shallow bay flat (3 ft) | Small jig + curly tail, Inline spinner (silver) |
| Summer | 2 to 5 ft | dawn | Deep basin (5 ft) | Small spinner rig drifted, 1/8 oz jigging spoon |
| Fall | 2 to 5 ft | midday | Deep basin (5 ft) | Jigging spoon (small), Blade bait |
| Winter | 2 to 5 ft | dusk | Deep basin (5 ft) | Small rattle spoon, Tungsten + spikes |
Structure-wise the chart holds 5 features, led in depth by Deep basin at roughly 5 ft.
Access data: OpenStreetMap contributors (ODbL) — community-mapped launches. Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for New Hampshire waters are set by the New Hampshire Fish and Game — and special regulations can apply to Locke Lake specifically, so confirm the current rules before you fish.
Check the official New Hampshire fishing regulations →
Locke Lake is about 5 ft (2 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, yellow perch, chain pickerel, bluegill, white perch on Locke Lake.
Shallow bay flat is the top-rated area: a weed flat in about 3 ft of water that rates prime for largemouth bass in spring. Every other rated spot, per species and season, is on the map above.
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 Locke Lake is regulated by the New Hampshire Fish and Game. Check the official New Hampshire regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Halfmoon Lake 1 mi · BRINDLE POND 1 mi · Suncook Lake, Lower 2 mi · Suncook Lake, Upper 3 mi · Barnstead Parade Dam Pond 4 mi · Lougee Pond 4 mi · DOWNING POND 5 mi · Marsh Pond (Mill Pond) 5 mi · LILY LAKE 6 mi · CLUB POND 6 mi · Crystal Lake 6 mi · Jones Dam Pond 6 mi
See how Locke Lake stacks up: best largemouth bass lakes in New Hampshire · best bluegill lakes in New Hampshire · best yellow perch lakes in New Hampshire · best chain pickerel lakes in New Hampshire
More water nearby: Belknap County fishing maps (43 charts). Browse all New Hampshire 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.