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40-acre lake near Smith County. The lake tops out around 18 ft. What you see is a modeled chart: the shoreline is real, the max depth is published, and the contours between are estimated. Plan with it; don't navigate by it. Species by species, here's what the data says the year looks like.
On the chart, Marathon Lake draws 42 acres inside 2 miles of shoreline. An index of 2.3 puts the bank firmly in maze territory: point after pocket after cove, every one a casting target. The shallow band under 15 ft claims about 93% of the surface on the model — that's where the groceries are. Tip to tip the water measures near 0.7 mi with a 0.3-mi widest point. You'll find it in Smith County. For a second option, Lake Claude Bennett lies 20 mi east.
Spring puts largemouth bass in skinny water — 2 to 10 ft is the zone. Warm water sends them out to 5 to 18 ft; cold water stacks them in 5 to 18 ft. Shallow bay flat is the standout, a weed flat at roughly 3 ft, rated prime for spring largemouth bass. Plan around early morning and the evening in the warm months. A texas-rigged 10" worm or a deep-diving crankbait covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Shallow bay flat (3 ft) | Spinnerbait, Chatterbait |
| Summer | 5 to 18 ft | dawn & dusk | Break off the point (8 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Main-lake point (8 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 5 to 18 ft | midday | Break off the point (8 ft) | Blade bait, Jigging spoon |
Start shallow in spring: bluegill sit in 1 to 6 ft that time of year. Warm water sends them out to 4 to 15 ft; cold water stacks them in 5 to 18 ft. Top water on the chart: Shallow bay flat, a weed flat in the 3 ft range, prime in spring. Fish it in early morning and the evening and you'll meet the bite. Throw a small sponge spider (fly) or a micro tube jig until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | Shallow bay flat (3 ft) | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 4 to 15 ft | dawn & dusk | Shallow bay flat (3 ft) | Small sponge spider (fly), Micro tube jig |
| Fall | 6 to 18 ft | midday | Break off the point (8 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 5 to 18 ft | midday | Deep basin (15 ft) | Tiny spoon |
In spring, crappie run shallow here, mostly 2 to 8 ft. Midsummer fish sit out in 5 to 18 ft before dropping to 5 to 18 ft for winter. Winter crappie concentrate at Deep basin, a prime-rated deep basin around 15 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a jig trolled/spider-rigged or a small crankbait (trolled) most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (3 ft) | 1/16 oz jig + tube, Curly-tail grub |
| Summer | 5 to 18 ft | dawn & dusk | Break off the point (8 ft) | Jig trolled/spider-rigged, Small crankbait (trolled) |
| Fall | 5 to 18 ft | dawn | Break off the point (8 ft) | Jig + minnow combo, Small swimbait (1.5-2") |
| Winter | 5 to 18 ft | midday | Deep basin (15 ft) | Tungsten jig + soft plastic, Tiny jigging spoon |
Spring puts channel catfish in skinny water — 3 to 12 ft is the zone. Warm water sends them out to 5 to 18 ft; cold water stacks them in 5 to 18 ft. Deep basin is the standout, a deep basin at roughly 15 ft, rated prime for winter channel catfish. Plan around after dark and the evening in the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dusk | Shallow bay flat (3 ft) | |
| Summer | 5 to 18 ft | night & dusk | Deep basin (15 ft) | |
| Fall | 5 to 18 ft | dusk | Deep basin (15 ft) | |
| Winter | 5 to 18 ft | midday | Deep basin (15 ft) |
The chart marks 5 structure features on Marathon Lake; the deepest is Deep basin at about 15 ft.
Season dates, license requirements, and size and bag limits for Mississippi waters are set by the Mississippi Wildlife, Fisheries & Parks — and special regulations can apply to Marathon Lake specifically, so confirm the current rules before you fish.
Check the official Mississippi fishing regulations →
Marathon Lake is about 18 ft (5 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
Anglers target largemouth bass, bluegill, crappie, channel catfish on Marathon 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.
Shallow bay flat is the top-rated area: a weed flat in about 3 ft of water that rates prime for largemouth bass in spring. Scroll up to the map for the complete spot list by 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 Marathon Lake is regulated by the Mississippi Wildlife, Fisheries & Parks. Check the official Mississippi regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Lake Claude Bennett 20 mi · Golden Memorial Park Lake 26 mi · Simpson County Lake 32 mi · Okatibbee Reservoir 39 mi · Lake Bogue Homa 39 mi · Neshoba County Lake 41 mi · Ross Barnett Reservoir 41 mi · Pearl River 46 mi · Mayes Lake 47 mi · Lake Dockery 53 mi · Lake Mary Crawford 64 mi · Turkey Fork Lake 70 mi
See how Marathon Lake stacks up: best largemouth bass lakes in Mississippi · best crappie lakes in Mississippi · best bluegill lakes in Mississippi · best channel catfish lakes in Mississippi
Browse all Mississippi fishing maps or see every water on DepthScout. 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.