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19 km of the Sagadahoc River navigation corridor, with channel depths from USACE hydrographic survey. The river tops out around 126 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 season-by-season read for each species follows, from the map's own numbers.
Drawn out, this is 13,769 acres of water rimmed by 31.3 miles of bank. The shoreline is moderately structured (index 1.9) — enough points and pockets to pattern. Roughly 11% of the water is 15 ft or less, the band where the food chain lives. End to end it runs roughly 11.2 mi, about 2.8 mi across. For a second option, Robinhood Cove lies 3 mi east.
In spring, landlocked salmon run shallow here, mostly 1 to 15 ft. Midsummer fish sit out in 25 to 60 ft before dropping to 10 to 40 ft for winter. Summer landlocked salmon concentrate at Current seam (mile 2.3), a prime-rated current seam around 43 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a dodger + streamer down deep or a thin spoon on lead core most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 15 ft | dawn & dusk | open water | Streamer flies (Grey Ghost) off boards, Thin spoon (Mooselook style) |
| Summer | 25 to 60 ft | dawn & dusk | Current seam (mile 2.3) (43 ft) | Dodger + streamer down deep, Thin spoon on lead core |
| Fall | 5 to 30 ft | dawn & dusk | open water | Casting spoon at the mouths, Streamers |
| Winter | 10 to 40 ft | dawn | Current seam (mile 2.3) (43 ft) | Small jigging spoon, Swedish pimple + smelt |
When the water first warms, brown trout slide up into 3 to 25 ft. Summer is a 25 to 60 ft game here, winter a 5 to 35 ft one. Start at Current seam (mile 2.3). It's a current seam holding about 43 ft of water and rates prime come summer. The feeding windows run after dark and early morning. Keep a spoon at the thermocline or a deep stickbait (night) rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | open water | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 25 to 60 ft | night & dawn | Current seam (mile 2.3) (43 ft) | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 5 to 30 ft | dusk & dawn | open water | Jerkbait over gravel, Casting spoon |
| Winter | 5 to 35 ft | dawn | Current seam (mile 2.3) (43 ft) | Jigging spoon, Small stickbait (slow) |
In spring, rainbow trout run shallow here, mostly 5 to 20 ft. Midsummer fish sit out in 8 to 30 ft before dropping to 8 to 40 ft for winter. Winter rainbow trout concentrate at Current seam (mile 2.3), a prime-rated current seam around 43 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a dodger + spoon (deep troll) or a flutter spoon most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Current seam (mile 2.3) (43 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Current seam (mile 2.3) (43 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | Current seam (mile 2.3) (43 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | Current seam (mile 2.3) (43 ft) | Jigging spoon, Tube jig (white) |
The spring pattern is a shallow one: smallmouth bass in 3 to 12 ft. As the season builds they drop to 10 to 30 ft, wintering in 20 to 45 ft. Top water on the chart: Current seam (mile 2.3), a current seam in the 43 ft range, prime in winter. Time it for early morning and the evening. Summer baits: a drop shot (goby/minnow) or a ned rig gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Current seam (mile 2.3) (43 ft) | Ned rig, Tube jig |
| Summer | 10 to 30 ft | dawn & dusk | Current seam (mile 2.3) (43 ft) | Drop shot (goby/minnow), Ned rig |
| Fall | 8 to 25 ft | midday & dawn | Current seam (mile 2.3) (43 ft) | Jerkbait, Blade bait |
| Winter | 20 to 45 ft | midday | Current seam (mile 2.3) (43 ft) | Blade bait, Hair jig |
6 pieces of structure are mapped here — Main-channel hole (mile 0.6), around 78 ft, is the deepest of them.
Access data: Maine GeoLibrary — Boat Launches (Maine IF&W / DACF). Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for Maine waters are set by the Maine IFW — and special regulations can apply to Sagadahoc River specifically, so confirm the current rules before you fish.
Check the official Maine fishing regulations →
Sagadahoc River is about 126 ft (38 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 landlocked salmon, brown trout, rainbow trout, smallmouth bass on Sagadahoc River. This isn't a survey of the water — none is published for it — but an informed estimate from the species common to the region, narrowed by this water's depth, size and each species' range.
Current seam (mile 2.3) is the top-rated area: a current seam in about 43 ft of water that rates prime for brown trout in summer. Scroll up to the map for the complete spot list by species and season.
For landlocked salmon, 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.
Fishing on Sagadahoc River is regulated by the Maine IFW. Check the official Maine regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Robinhood Cove 3 mi · Hall Bay 4 mi · Todd Bay 4 mi · Harmon Harbor 4 mi · Knubble Bay 4 mi · Hockomock Bay 5 mi · Sagadahoc Bay 5 mi · Brookings Bay 6 mi · Stage Island Bay 6 mi · Ebenecook Harbor 6 mi · Sheepscot Bay 7 mi · Cape Harbor 8 mi
See how Sagadahoc River stacks up: best smallmouth bass lakes in Maine · best rainbow trout lakes in Maine · best brown trout lakes in Maine · best landlocked salmon lakes in Maine
Browse all Maine 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.