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692-acre Clinton County lake with lily pads and steady bass, crappie and bluegill fishing. The lake tops out around 36 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 685 acres wrapped in 14.2 miles of bank. A development index of 3.9 means a maze of bays and points: far more casting targets than a round bowl of the same size. 64% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. Figure 3.2 mi of water from one end to the other, 1.3 mi at the beam. It sits in Clinton County. If the bite dies, Caesar Creek Lake is 11 mi to the northwest.
Spring largemouth bass on Cowan Lake hold shallow, usually 2 to 10 ft. They move out to 8 to 20 ft in summer and finish the year down in 15 to 35 ft. Put Lily pad flat (upper end) first on the milk run — a weed flat near 2 ft that grades prime for spring. The feeding windows run early morning and the evening. The summer box starts with a texas-rigged 10" worm or a deep-diving crankbait.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Lily pad flat (upper end) (2 ft) | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | Brush piles (crappie beds) (14 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Beach point (3 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 15 to 35 ft | midday | Old creek channel (16 ft) | Blade bait, Jigging spoon |
Early season crappie use the shallows, holding in 2 to 8 ft. Summer is a 10 to 25 ft game here, winter a 15 to 35 ft one. The chart's best answer is Brush piles (crappie beds) — standing timber / brush, 14 ft, prime for summer. Best bite is early morning and the evening. Tie on a jig trolled/spider-rigged or a small crankbait (trolled) and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Lily pad flat (upper end) (2 ft) | 1/16 oz jig + tube, Curly-tail grub |
| Summer | 10 to 25 ft | dawn & dusk | Brush piles (crappie beds) (14 ft) | Jig trolled/spider-rigged, Small crankbait (trolled) |
| Fall | 8 to 20 ft | dawn | Old creek channel (16 ft) | Jig + minnow combo, Small swimbait (1.5-2") |
| Winter | 15 to 35 ft | midday | Dam basin (30 ft) | Tungsten jig + soft plastic, Tiny jigging spoon |
Early season bluegill use the shallows, holding in 1 to 6 ft. Expect a summer slide to 4 to 15 ft, then a winter hold in 10 to 25 ft. Put Lily pad flat (upper end) first on the milk run — a weed flat near 2 ft that grades prime for spring. In summer the feeding windows fall in early morning and the evening. Tie on a small sponge spider (fly) or a micro tube jig and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | Lily pad flat (upper end) (2 ft) | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 4 to 15 ft | dawn & dusk | Lily pad flat (upper end) (2 ft) | Small sponge spider (fly), Micro tube jig |
| Fall | 6 to 18 ft | midday | Shallow feeding flat (18 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 10 to 25 ft | midday | Dam basin (30 ft) | Tungsten ice jig + plastic, Tiny spoon |
Spring channel catfish on Cowan Lake hold shallow, usually 3 to 12 ft. They move out to 8 to 25 ft in summer and finish the year down in 11 to 36 ft. Put Old creek channel first on the milk run — a creek channel near 16 ft that grades prime for summer. The feeding windows run after dark and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dusk | Brush piles (crappie beds) (14 ft) | |
| Summer | 8 to 25 ft | night & dusk | Old creek channel (16 ft) | |
| Fall | 10 to 30 ft | dusk | Old creek channel (16 ft) | |
| Winter | 11 to 36 ft | midday | Dam basin (30 ft) |
In spring, saugeye run shallow here, mostly 3 to 12 ft. Summer pushes them deeper, 8 to 22 ft, and winter fish settle into 12 to 30 ft. Dam basin is the standout, a deep basin at roughly 30 ft, rated prime for winter saugeye. Time it for the evening and early morning. You won't need more than a crawler harness (shallow) or a jig + crawler most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dusk & dawn | Beach point (3 ft) | 1/8 oz jig + twister tail, Blade bait |
| Summer | 8 to 22 ft | dusk & dawn | Old creek channel (16 ft) | Crawler harness (shallow), Jig + crawler |
| Fall | 8 to 28 ft | dusk & dawn | Old creek channel (16 ft) | Blade bait, Jigging rap |
| Winter | 12 to 30 ft | dusk & dawn | Dam basin (30 ft) | Jigging spoon + minnow head, Blade bait |
Cowan Lake carries 10 mapped structure features, topping out (or rather bottoming out) at Dam basin, about 30 ft down.
Access data: Ohio DNR — Boater & Stream Access. Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for Ohio waters are set by the Ohio DNR Division of Wildlife — and special regulations can apply to Cowan Lake specifically, so confirm the current rules before you fish.
Check the official Ohio fishing regulations →
Cowan Lake is about 36 ft (11 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 largemouth bass, crappie, bluegill, channel catfish, saugeye on Cowan Lake. 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.
Lily pad flat (upper end) is the top-rated area: a weed flat in about 2 ft of water that rates prime for largemouth bass in spring. Open the map above to see every rated spot for each species and season.
For largemouth bass, 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 Cowan Lake is regulated by the Ohio DNR Division of Wildlife. Check the official Ohio regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Caesar Creek Lake 11 mi · Little Miami River 12 mi · Stonelick Lake 15 mi · Mounts Park South 15 mi · Rocky Fork Lake 26 mi · Grant Lake 27 mi · Paint Creek Lake 28 mi · East Fork Lake (Harsha Lake) 28 mi · Eastwood Lake 30 mi · Winton Woods Lake 34 mi · Great Miami River 37 mi · Deer Creek Lake 39 mi
See how Cowan Lake stacks up: best largemouth bass lakes in Ohio · best saugeye lakes in Ohio · best crappie lakes in Ohio · best bluegill lakes in Ohio
Browse all Ohio 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.