Cobbosseecontee Lake fishing: Largemouth Bass, Brook Trout, Brown Trout
Target species: Largemouth Bass, Brook Trout, Brown Trout, Black Crappie, Yellow Perch, Pumpkinseed, Redbreast
Boat: 2 ramps and launches on file for this water.
Start here: Launch at Cobbosseecontee Lake — Monmouth.
The lake
Cobbosseecontee Lake covers 5,318 acres in Maine, across Kennebec County. It is a lake: the deepest point measured is 100 feet (30.5 m). Our records hold 10 species for this water.
Depth: down to 100 ft at the deepest measured point
Deepest measured point: 100 ft (30.5 m). We hold 169 depth contours for this water, drawn from 382 soundings.
- 0–5 ft: 15.4% of the surveyed bottom
- 5–10 ft: 20% of the surveyed bottom
- 10–15 ft: 16.3% of the surveyed bottom
- 15–20 ft: 12.8% of the surveyed bottom
- 20–25 ft: 8.2% of the surveyed bottom
- 25–30 ft: 6.9% of the surveyed bottom
- 30–35 ft: 7.5% of the surveyed bottom
- 35–40 ft: 6.5% of the surveyed bottom
- 40–45 ft: 4% of the surveyed bottom
- 45–50 ft: 2.1% of the surveyed bottom
- 50–55 ft: 0.2% of the surveyed bottom
7 target fish, led by Largemouth Bass
- Largemouth Bass — Feeding water: 65–85°F.
- Brook Trout — Feeding water: 50–65°F.
- Brown Trout — Feeding water: 50–65°F.
- Black Crappie — Feeding water: 65–75°F.
- Yellow Perch — Feeding water: 45–75°F.
- Pumpkinseed — Feeding water: 65–80°F.
- Redbreast — Feeding water: 65–80°F.
Also recorded here: Atlantic Salmon, Rainbow Trout, White Perch.
Stocking: 46,850 fish, 2010–2025
Maine Department of Inland Fisheries and Wildlife records list 46,850 fish released into this water from 2010 to 2025.
- Brown Trout: 41,300 in 2010–2025
- Brook Trout: 5,550 in 2010–2013
2 ramps and launches on this water
On this water we hold 2 boat ramps.
- Cobbosseecontee Lake — Monmouth — Monmouth, Local.
- Cobbosseecontee Lake — Winthrop — Winthrop, State.
Fee and opening hours are blank for all 2 places in this list: a blank means we hold no such field, not that it is free or always open, and this list may not be complete.
What is hard here
Wind is the limit, not the fish: 5,318 acres of open water build a short steep chop, and there is no shelter in the middle. Only 2 public ramps are on file, so the launch decides where you fish.
Where this data comes from
- Maine DEP — Maine DEP: depth soundings: class A, a survey of the bottom.
- Webster, K.E., McCullough, I.M., Soranno, P.A. LAGOS-US DEPTH v1.0, EDI, doi:10.6073/pasta/64ddc4d04661d9aef4bd702dc5d8984f (CC BY 4.0); Cheruvelil et al. LAGOS-US LOCUS v1.0 (EDI) — LAGOS-US DEPTH v1.0: Lake depth for 17,675 lakes in the conterminous U.S.: class B, a depth figure measured and published by an agency, without a bottom map.
