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Fishing Upper Jo-Mary Lake: what the data says
1,847-acre lake near TA R10 WELS. The lake tops out around 72 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.
Brook Trout fishing at Upper Jo-Mary Lake
In spring, brook trout run shallow here, mostly 2 to 15 ft. Summer pushes them deeper, 10 to 30 ft, and winter fish settle into 3 to 20 ft. If you only fish one area, make it Duck Brook inflow: a inflow / creek mouth around 7 ft that scores prime in spring. In summer the feeding windows fall in early morning and the evening. Summer baits: a small spoon fished deep or a trolled lake-clear wobbler + worm gets it done.
| 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 |
Landlocked Salmon fishing at Upper Jo-Mary Lake
In spring, landlocked salmon run shallow here, mostly 1 to 15 ft. They move out to 25 to 60 ft in summer and finish the year down in 10 to 40 ft. If you only fish one area, make it Duck Brook inflow: a inflow / creek mouth around 7 ft that scores prime in spring. Plan around early morning and the evening in the warm months. A dodger + streamer down deep or a thin spoon on lead core covers the summer program.
| 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 |
Brown Bullhead fishing at Upper Jo-Mary Lake
Start shallow in spring: brown bullhead sit in 2 to 8 ft that time of year. Summer pushes them deeper, 3 to 12 ft, and winter fish settle into 10 to 25 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 after dark and the evening.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 2 to 8 ft | dusk & night | |
| Summer | 3 to 12 ft | night & dusk | |
| Fall | 5 to 15 ft | dusk | |
| Winter | 10 to 25 ft | midday |
Chain Pickerel fishing at Upper Jo-Mary Lake
Spring chain pickerel on Upper Jo-Mary Lake hold shallow, usually 2 to 10 ft. Summer pushes them deeper, 3 to 15 ft, and winter fish settle into 5 to 18 ft. The spot to know is Shallow bay flat, a weed flat in about 3 ft of water that rates prime for chain pickerel in spring. Best bite is early morning and the evening. A weedless spoon + trailer or a buzzbait covers the summer program.
| 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) |
Burbot fishing at Upper Jo-Mary Lake
Start shallow in spring: burbot sit in 25 to 70 ft that time of year. By summer they slide out to 22 to 72 ft, and by winter most fish are in 15 to 60 ft. If you only fish one area, make it Deep basin: a deep basin around 70 ft that scores prime in spring. In summer the feeding windows fall in after dark and midday. A heavy jig + cut bait covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 25 to 70 ft | night & dusk | Glow jigging spoon + cut bait, Rattle bait (dark) |
| Summer | 22 to 72 ft | night & midday | Heavy jig + cut bait |
| Fall | 22 to 72 ft | night & dusk | Glow spoon + minnow head, Blade bait (slow) |
| Winter | 15 to 60 ft | night & dusk | Glow tungsten + cut bait, Rattle spoon + minnow head |
Lake Trout fishing at Upper Jo-Mary Lake
In spring, lake trout run shallow here, mostly 10 to 40 ft. Summer pushes them deeper, 22 to 72 ft, and winter fish settle into 18 to 72 ft. The spot to know is Deep basin, a deep basin in about 70 ft of water that rates prime for lake trout in summer. Plan around early morning in the warm months. A white tube jig (deep) or a magnum spoon on downrigger covers the summer program.
| Season | Depth | Best window | Go-to baits |
|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 22 to 72 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 | 18 to 72 ft | dawn | White tube jig, Airplane jig |
Notable structure
- Deep basin: deep basin, around 70 ft
- Break off the point: drop-off, around 42 ft
- Old creek channel: creek channel, around 42 ft
- Shallow feeding flat: feeding flat, around 12 ft
- Secondary point: point, around 7 ft
- Duck Brook inflow: inflow / creek mouth, around 7 ft
- Main-lake point: point, around 6 ft
- Back-bay flat: weed flat, around 6 ft
- Shallow bay flat: weed flat, around 3 ft
Common questions
How deep is Upper Jo-Mary Lake?
Upper Jo-Mary Lake is about 72 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 Upper Jo-Mary Lake?
Anglers target lake trout, brook trout, landlocked salmon, chain pickerel, burbot, brown bullhead on Upper Jo-Mary Lake.
Where is the best fishing spot on Upper Jo-Mary Lake?
Duck Brook inflow is the top-rated area: a inflow / creek mouth in about 7 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 Upper Jo-Mary Lake?
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.
Nearby waters
Lower Jo-Mary Lake · Cedar Pond · Church Pond · Pemadumcook Lake · Johnston Pond · Gauntlet Pond
See how Upper Jo-Mary Lake stacks up: best lake trout lakes in Maine · best brook trout lakes in Maine · best landlocked salmon lakes in Maine · best chain pickerel 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.