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99-acre lake near Ridgefield. CT DEEP survey water. The lake tops out around 9 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:
The drawn water covers 99 acres wrapped in 2 miles of bank. The basin is a simple one (shoreline index 1.4) — close to a bowl, so the structure on the chart matters more than the bank. Every acre of it sits shallower than ~15 ft: one big littoral zone, cover and forage throughout. Tip to tip the water measures near 0.9 mi with a 0.2-mi widest point. It sits in Western Connecticut County. If the bite dies, Lake Kenosia is 5 mi to the north.
Spring puts yellow perch in skinny water — 2 to 9 ft is the zone. Summer fish stay in 3 to 9 ft, and winter fish hold in 3 to 9 ft. Shallow bay flat is the standout, a weed flat at roughly 2 ft, rated prime for spring yellow perch. Plan around early morning in the warm months. A drop-shot micro plastics or a small spoon tipped with worm covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 9 ft | midday & dawn | Shallow bay flat (2 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 3 to 9 ft | dawn | Deep basin (9 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 3 to 9 ft | midday | Deep basin (9 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 3 to 9 ft | midday & dawn | Deep basin (9 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Early season largemouth bass use the shallows, holding in 2 to 9 ft. Even in summer they hold at 3 to 9 ft; winter keeps them in 3 to 9 ft. The chart's best answer is Shallow bay flat — weed flat, 2 ft, prime for spring. Best bite is early morning and the evening. Tie on a texas-rigged 10" worm or a deep-diving crankbait and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 9 ft | dawn & dusk | Shallow bay flat (2 ft) | Spinnerbait, Chatterbait |
| Summer | 3 to 9 ft | dawn & dusk | Back-bay flat (3 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 2 to 9 ft | midday & dawn | Main-lake point (2 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 3 to 9 ft | midday | Break off the point (6 ft) | Blade bait, Jigging spoon |
Spring crappie on Mamanasco Lake hold shallow, usually 2 to 8 ft. They move out to 3 to 9 ft in summer and finish the year down in 3 to 9 ft. Put Deep basin first on the milk run — a deep basin near 9 ft that grades prime for winter. The feeding windows run early morning and the evening. The summer box starts with a jig trolled/spider-rigged or a small crankbait (trolled).
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (2 ft) | 1/16 oz jig + tube, Curly-tail grub |
| Summer | 3 to 9 ft | dawn & dusk | Back-bay flat (3 ft) | Jig trolled/spider-rigged, Small crankbait (trolled) |
| Fall | 3 to 9 ft | dawn | Back-bay flat (3 ft) | Jig + minnow combo, Small swimbait (1.5-2") |
| Winter | 3 to 9 ft | midday | Deep basin (9 ft) | Tungsten jig + soft plastic, Tiny jigging spoon |
Spring bluegill on Mamanasco Lake hold shallow, usually 1 to 6 ft. By summer they slide out to 2 to 9 ft, and by winter most fish are in 3 to 9 ft. The chart's best answer is Shallow bay flat — weed flat, 2 ft, prime for spring. Prime time lands in early morning and the evening. The summer box starts with a small sponge spider (fly) or a micro tube jig.
| 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 | 2 to 9 ft | dawn & dusk | Shallow bay flat (2 ft) | Small sponge spider (fly), Micro tube jig |
| Fall | 3 to 9 ft | midday | Back-bay flat (3 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 3 to 9 ft | midday | Deep basin (9 ft) | Tungsten ice jig + plastic, Tiny spoon |
Spring puts pumpkinseed in skinny water — 1 to 8 ft is the zone. As the season builds they drop to 2 to 9 ft, wintering in 3 to 9 ft. Spring pumpkinseed concentrate at Shallow bay flat, a prime-rated weed flat around 2 ft. Warm-month bites cluster around the evening and early morning. A micro tube or a sponge spider (fly) covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 8 ft | midday & dusk | Shallow bay flat (2 ft) | Micro jig under a float, Tiny beetle-spin |
| Summer | 2 to 9 ft | dusk & dawn | Shallow bay flat (2 ft) | Micro tube, Sponge spider (fly) |
| Fall | 3 to 9 ft | dusk & dawn | Back-bay flat (3 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 3 to 9 ft | dawn | Back-bay flat (3 ft) | Tungsten ice jig + plastic, Tiny spoon |
Spring brown bullhead on Mamanasco Lake hold shallow, usually 2 to 8 ft. By summer they slide out to 2 to 9 ft, and by winter most fish are in 3 to 9 ft. The chart's best answer is Deep basin — deep basin, 9 ft, prime for winter. Prime time lands in after dark and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | dusk & night | Shallow bay flat (2 ft) | |
| Summer | 2 to 9 ft | night & dusk | Shallow bay flat (2 ft) | |
| Fall | 3 to 9 ft | dusk | Deep basin (9 ft) | |
| Winter | 3 to 9 ft | midday | Deep basin (9 ft) |
Mamanasco Lake also holds chain pickerel (2 to 9 ft in summer). Pick any of them on the map above for rated spots and bait picks.
The chart marks 6 structure features on Mamanasco Lake; the deepest is Deep basin at about 9 ft.
Access data: Connecticut DEEP — State Boat Launches. Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for Connecticut waters are set by the Connecticut DEEP — and special regulations can apply to Mamanasco Lake specifically, so confirm the current rules before you fish.
Check the official Connecticut fishing regulations →
Mamanasco Lake is about 9 ft (3 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 yellow perch, largemouth bass, crappie, bluegill, pumpkinseed, brown bullhead, chain pickerel on Mamanasco Lake.
Shallow bay flat is the top-rated area: a weed flat in about 2 ft of water that rates prime for yellow perch in spring. The map above holds the full rated-spot list for every species and season.
For yellow perch, the summer bite is best in 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 Mamanasco Lake is regulated by the Connecticut DEEP. Check the official Connecticut regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Lake Kenosia 5 mi · Titicus Reservoir 5 mi, NY · East Branch Reservoir 6 mi, NY · Diverting Reservoir 7 mi, NY · Bog Brook Reservoir 7 mi, NY · Cross River Reservoir 7 mi, NY · Croton Falls Reservoir 8 mi, NY · Middle Branch Reservoir 8 mi, NY · Muscoot Reservoir 9 mi, NY · Saugatuck Reservoir 9 mi · Lake Gilead 9 mi, NY · Ball Pond 10 mi
See how Mamanasco Lake stacks up: best largemouth bass lakes in Connecticut · best crappie lakes in Connecticut · best bluegill lakes in Connecticut · best yellow perch lakes in Connecticut
More water nearby: Western Connecticut County fishing maps (8 charts). Browse all Connecticut 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.