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74-acre lake near Ossipee. NH GRANIT / NH Fish & Game survey water. The lake tops out around 20 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. The rest of this page walks each species through its year, using the map's own scoring.
The outline encloses 74 acres, worked by 1.3 miles of shoreline. The basin is a simple one (shoreline index 1.1) — close to a bowl, so the structure on the chart matters more than the bank. The shallow band under 15 ft claims about 68% of the surface — that's where the groceries are. The basin spans about 0.5 mi end to end and 0.3 mi across at its widest. It sits in Carroll County. White Pond (Ossipee) sits 2 mi southeast — the closest neighbouring chart.
Early season brook trout use the shallows, holding in 2 to 15 ft. Expect a summer slide to 6 to 20 ft, then a winter hold in 3 to 20 ft. Put Deep basin first on the milk run — a deep basin near 20 ft that grades prime for summer. In summer the feeding windows fall in early morning and the evening. Tie on a small spoon fished deep or a trolled lake-clear wobbler + worm and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Shallow bay flat (4 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 6 to 20 ft | dawn & dusk | Deep basin (20 ft) | 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 | Deep basin (20 ft) | Small jigging spoon, Tungsten jig + plastic |
Spring rainbow trout on Duncan Lake hold shallow, usually 5 to 20 ft. Depth-wise the year is flat: 5 to 20 ft in summer, 4 to 20 ft once it turns cold. The chart's best answer is Deep basin — deep basin, 20 ft, prime for winter. Prime time lands in early morning and the evening. The summer box starts with a dodger + spoon (deep troll) or a flutter spoon.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Back-bay flat (5 ft) | Inline spinner (silver), Small spoon |
| Summer | 5 to 20 ft | dawn & dusk | Deep basin (20 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 6 to 20 ft | dawn & dusk | Deep basin (20 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 4 to 20 ft | dawn | Deep basin (20 ft) | Jigging spoon, Tube jig (white) |
Count 3 structure marks on this chart. The deepest, Deep basin, sits near 20 ft.
Access data: New Hampshire Fish & Game — Public Access Sites. Confirm conditions and fees locally before you launch.
| Date | Species | Count | Size |
|---|---|---|---|
| May 19 | Rainbow Trout | 600 | — |
| May 18 | Brook Trout | 450 | — |
| Apr 23 | Brook Trout | 450 | — |
| Apr 23 | Rainbow Trout | 500 | — |
Source: NH Fish & Game stocking report, retrieved 2026-08-18.
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 Duncan Lake specifically, so confirm the current rules before you fish.
Check the official New Hampshire fishing regulations →
Duncan Lake is about 20 ft (6 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 brook trout, rainbow trout on Duncan Lake.
Deep basin is the top-rated area: a deep basin in about 20 ft of water that rates prime for brook trout 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.
Yes — per NH Fish & Game stocking report records, Duncan Lake was most recently stocked May 19 with 600 rainbow trout. The full stocking history is listed above.
Fishing on Duncan 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.
White Pond (Ossipee) 2 mi · ARCHERS POND 2 mi · Dan Hole Pond, Little 6 mi · Beech Pond, Lower 6 mi · Province Lake 6 mi · Dan Hole Pond 6 mi · Ossipee Lake 6 mi · Beech Pond, Upper 6 mi · Leavitt Bay 7 mi · Broad Bay 7 mi · Pine River Pond 7 mi · Berry Bay 7 mi
See how Duncan Lake stacks up: best rainbow trout lakes in New Hampshire · best brook trout lakes in New Hampshire
More water nearby: Carroll County fishing maps (64 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.