Shared by DepthScout anglers. Exact spots stay private, always.
16 km of the Saint Marks River navigation corridor, with channel depths from USACE hydrographic survey. The river tops out around 27 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 7,511 acres wrapped in 25.4 miles of bank. With a 2.1 development index there's bank structure worth casting at, in moderation. The shallow band under 15 ft claims about 93% of the surface — that's where the groceries are. End to end it runs roughly 6.9 mi, about 2.7 mi across. Its nearest charted neighbour, Lake Hall, is 27 mi to the north.
When the water first warms, largemouth bass slide up into 2 to 10 ft. Summer is an 8 to 20 ft game here, winter an 8 to 27 ft one. Start at Channel bar / point (mile 6.3). It's a point holding about 16 ft of water and rates prime come fall. The feeding windows run early morning and the evening. Keep a texas-rigged 10" worm or a deep-diving crankbait rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | open water | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | Channel bar / point (mile 6.3) (16 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Channel bar / point (mile 6.3) (16 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 8 to 27 ft | midday | Outside-bend hole (mile 0.4) (16 ft) | Blade bait, Jigging spoon |
Come spring, look for crappie tight to the bank in 2 to 8 ft. They move out to 10 to 25 ft in summer and finish the year down in 8 to 27 ft. If you only fish one area, make it Outside-bend hole (mile 0.4): a creek channel around 16 ft that scores prime in fall. Best bite is early morning and the evening. A jig trolled/spider-rigged or a small crankbait (trolled) is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | open water | 1/16 oz jig + tube, Curly-tail grub |
| Summer | 10 to 25 ft | dawn & dusk | Outside-bend hole (mile 0.4) (16 ft) | Jig trolled/spider-rigged, Small crankbait (trolled) |
| Fall | 8 to 20 ft | dawn | Outside-bend hole (mile 0.4) (16 ft) | Jig + minnow combo, Small swimbait (1.5-2") |
| Winter | 8 to 27 ft | midday | Outside-bend hole (mile 0.4) (16 ft) | Tungsten jig + soft plastic, Tiny jigging spoon |
When the water first warms, bluegill slide up into 1 to 6 ft. By summer they slide out to 4 to 15 ft, and by winter most fish are in 10 to 25 ft. If you only fish one area, make it Slackwater eddy (mile 4.1): an eddy pocket around 13 ft that scores prime in winter. In summer the feeding windows fall in early morning and the evening. Keep a small sponge spider (fly) or a micro tube jig rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | open water | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 4 to 15 ft | dawn & dusk | open water | Small sponge spider (fly), Micro tube jig |
| Fall | 6 to 18 ft | midday | Current seam (mile 2.2) (13 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 10 to 25 ft | midday | Slackwater eddy (mile 4.1) (13 ft) | Tiny spoon |
When the water first warms, channel catfish slide up into 3 to 12 ft. Summer is an 8 to 25 ft game here, winter an 8 to 27 ft one. Start at Outside-bend hole (mile 0.4). It's a creek channel holding about 16 ft of water and rates prime come 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 | Slackwater eddy (mile 4.1) (13 ft) | |
| Summer | 8 to 25 ft | night & dusk | Outside-bend hole (mile 0.4) (16 ft) | |
| Fall | 8 to 27 ft | dusk | Outside-bend hole (mile 0.4) (16 ft) | |
| Winter | 8 to 27 ft | midday | Outside-bend hole (mile 0.4) (16 ft) |
Come spring, look for longnose gar tight to the bank in 2 to 10 ft. Expect a summer slide to 1 to 12 ft, then a winter hold in 10 to 25 ft. Start at Slackwater eddy (mile 4.1). It's an eddy pocket holding about 13 ft of water and rates prime come winter. Prime time lands in midday and the evening. A rope lure or a small white spinner is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | midday | open water | Rope lure (hookless nylon), Inline spinner (slow) |
| Summer | 1 to 12 ft | midday & dusk | Slackwater eddy (mile 4.1) (13 ft) | Rope lure, Small white spinner |
| Fall | 4 to 15 ft | midday | Outside-bend hole (mile 0.4) (16 ft) | Rope lure, Small jerkbait (pause-heavy) |
| Winter | 10 to 25 ft | midday | Slackwater eddy (mile 4.1) (13 ft) |
Structure-wise the chart holds 4 features, led in depth by Outside-bend hole (mile 0.4) at roughly 16 ft.
Season dates, license requirements, and size and bag limits for Florida waters are set by the Florida Fish and Wildlife Conservation Commission — and special regulations can apply to Saint Marks River specifically, so confirm the current rules before you fish.
Check the official Florida fishing regulations →
Saint Marks River is about 27 ft (8 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, longnose gar on Saint Marks 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.
Outside-bend hole (mile 0.4) is the top-rated area: a creek channel in about 16 ft of water that rates prime for crappie in fall. The interactive chart above rates every 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 Saint Marks River is regulated by the Florida Fish and Wildlife Conservation Commission. Check the official Florida regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Lake Hall 27 mi · Lake Jackson (Leon) 28 mi · Lake Talquin 30 mi · Lake Miccosukee 34 mi · Lake Iamonia 35 mi · Carrabelle River 35 mi · Steinhatchee River 58 mi · Cutoff Pond 58 mi, GA · House Pond 58 mi, GA · Panic Pond 59 mi, GA · Lake Seminole 61 mi, GA/FL · Merritts Mill Pond 73 mi
See how Saint Marks River stacks up: best largemouth bass lakes in Florida · best crappie lakes in Florida · best bluegill lakes in Florida · best channel catfish lakes in Florida
Browse all Florida 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.