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Fishing Mousam Lake: what the data says
982-acre lake near Acton. The lake tops out around 88 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. Here is how the season plays out for each species, straight from the data behind the map.
Crappie fishing at Mousam Lake
In spring, crappie run shallow here, mostly 2 to 8 ft. They move out to 10 to 25 ft in summer and finish the year down in 15 to 35 ft. Back-bay flat is the standout, a weed flat at roughly 5 ft, rated prime for spring crappie. Plan around early morning and the evening in the warm months. A jig trolled/spider-rigged or a small crankbait (trolled) covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | 1/16 oz jig + tube, Curly-tail grub |
| Summer | 10 to 25 ft | dawn & dusk | Jig trolled/spider-rigged, Small crankbait (trolled) |
| Fall | 8 to 20 ft | dawn | Jig + minnow combo, Small swimbait (1.5-2") |
| Winter | 15 to 35 ft | midday | Tungsten jig + soft plastic, Tiny jigging spoon |
Brook Trout fishing at Mousam Lake
Spring brook trout on Mousam Lake hold shallow, usually 2 to 15 ft. By summer they slide out to 10 to 30 ft, and by winter most fish are in 3 to 20 ft. Pump Box Brook inflow is the standout, a inflow / creek mouth at roughly 5 ft, rated prime for spring brook trout. Plan around early morning and the evening in the warm months. A small spoon fished deep or a trolled lake-clear wobbler + worm covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Small jigging spoon, Tungsten jig + plastic |
Brown Trout fishing at Mousam Lake
Start shallow in spring: brown trout sit in 3 to 25 ft that time of year. Summer pushes them deeper, 25 to 60 ft, and winter fish settle into 5 to 35 ft. The spot to know is Pump Box Brook inflow, a inflow / creek mouth in about 5 ft of water that rates prime for brown trout in spring. In summer the feeding windows fall in after dark and early morning. Tie on a spoon at the thermocline or a deep stickbait (night) and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 25 to 60 ft | night & dawn | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 5 to 30 ft | dusk & dawn | Jerkbait over gravel, Casting spoon |
| Winter | 5 to 35 ft | dawn | Jigging spoon, Small stickbait (slow) |
Chain Pickerel fishing at Mousam Lake
Start shallow in spring: chain pickerel sit in 2 to 10 ft that time of year. They move out to 3 to 15 ft in summer and finish the year down in 5 to 18 ft. If you only fish one area, make it Back-bay flat: a weed flat around 5 ft that scores prime in spring. Plan around early morning and the evening in the warm months. Tie on a weedless spoon + trailer or a buzzbait and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 10 ft | midday & dawn | Inline spinner (silver), Small spoon (red/white) |
| Summer | 3 to 15 ft | dawn & dusk | Weedless spoon + trailer, Buzzbait |
| Fall | 4 to 15 ft | midday & dawn | Jerkbait along weed edges, Spinnerbait |
| Winter | 5 to 18 ft | dawn | Jigging spoon (through ice) |
Lake Trout fishing at Mousam Lake
In spring, lake trout run shallow here, mostly 10 to 40 ft. By summer they slide out to 26 to 88 ft, and by winter most fish are in 20 to 80 ft. Deep basin is the standout, a deep basin at roughly 79 ft, rated prime for summer lake trout. In summer the feeding windows fall in early morning. Tie on a white tube jig (deep) or a magnum spoon on downrigger and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 26 to 88 ft | dawn | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Heavy casting spoon, Jigging rap over reefs |
| Winter | 20 to 80 ft | dawn | White tube jig, Airplane jig |
Landlocked Salmon fishing at Mousam Lake
Spring landlocked salmon on Mousam Lake hold shallow, usually 1 to 15 ft. By summer they slide out to 25 to 60 ft, and by winter most fish are in 10 to 40 ft. If you only fish one area, make it Pump Box Brook inflow: a inflow / creek mouth around 5 ft that scores prime in spring. In summer the feeding windows fall in early morning and the evening. Tie on a dodger + streamer down deep or a thin spoon on lead core and you're in the game.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 1 to 15 ft | dawn & dusk | Streamer flies (Grey Ghost) off boards, Thin spoon (Mooselook style) |
| Summer | 25 to 60 ft | dawn & dusk | Dodger + streamer down deep, Thin spoon on lead core |
| Fall | 5 to 30 ft | dawn & dusk | Casting spoon at the mouths, Streamers |
| Winter | 10 to 40 ft | dawn | Small jigging spoon, Swedish pimple + smelt |
Mousam Lake also holds largemouth bass (8 to 20 ft in summer), smallmouth bass (10 to 30 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Notable structure
- Deep basin: deep basin, around 79 ft
- Break off the point: drop-off, around 44 ft
- Shallow feeding flat: feeding flat, around 22 ft
- Main-lake point: point, around 15 ft
- Shallow bay flat: weed flat, around 13 ft
- Secondary point: point, around 7 ft
- Shallow feeding flat: feeding flat, around 7 ft
- Back-bay flat: weed flat, around 5 ft
- Pump Box Brook inflow: inflow / creek mouth, around 5 ft
- Creek inflow: inflow / creek mouth, around 2 ft
Common questions
How deep is Mousam Lake?
Mousam Lake is about 88 ft at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.
What fish are in Mousam Lake?
Anglers target largemouth bass, smallmouth bass, crappie, lake trout, brown trout, brook trout, landlocked salmon, chain pickerel on Mousam Lake.
Where is the best fishing spot on Mousam Lake?
Pump Box Brook inflow is the top-rated area: a inflow / creek mouth in about 5 ft of water that rates prime for brook trout in spring. Open the map above to see every rated spot for each species and season.
When is the best time to fish Mousam Lake?
For crappie, 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.
Nearby waters
Square Pond · Shaker Pond · Little Ossipee Lake · Sand Pond · Sebago Lake · Lovewell Pond
See how Mousam Lake stacks up: best largemouth bass lakes in Maine · best smallmouth bass lakes in Maine · best crappie lakes in Maine · best lake trout lakes in Maine
Browse all Maine fishing maps or every water on DepthScout. Bathymetry credit: state fisheries survey programs. How we build these maps. For fishing guidance only, never navigation.