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13-acre lake near Cody Region. The lake tops out around 35 ft. The chart is a model: real shoreline, published maximum depth, interpolated in between. A planning tool, never a navigation product. Below is the species-by-species picture, pulled from the same data the map uses.
On the chart, Lake Marion draws 13 acres inside 0.9 miles of shoreline. The shoreline is moderately structured (index 1.8) — enough points and pockets to pattern. Littoral water — the productive band under ~15 ft — makes up 43% of this chart, as modeled. End to end it runs roughly 0.3 mi. The water lies in Big Horn County. For a second option, Mistymoon Lake lies 1 mi north.
Spring puts brook trout in skinny water — 2 to 15 ft is the zone. Warm water sends them out to 10 to 30 ft; cold water stacks them in 3 to 20 ft. Deep basin is the standout, a deep basin at roughly 30 ft, rated prime for summer brook trout. Plan around early morning and the evening in the warm months. A small spoon fished deep or a trolled lake-clear wobbler + worm covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (9 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 10 to 30 ft | dawn & dusk | Deep basin (30 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (9 ft) | Small spoon (orange), Spinner |
| Winter | 3 to 20 ft | dawn | Break off the point (16 ft) | Small jigging spoon, Tungsten jig + plastic |
In spring, lake trout run shallow here, mostly 9 to 35 ft. Summer keeps them at 11 to 35 ft, and they winter in 9 to 35 ft. Deep basin is the standout, a deep basin at roughly 30 ft, rated prime for summer lake trout. Time it for early morning. You won't need more than a white tube jig (deep) or a magnum spoon on downrigger most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 9 to 35 ft | dawn & dusk | Main-lake point (9 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 11 to 35 ft | dawn | Deep basin (30 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 7 to 35 ft | dusk & dawn | Main-lake point (9 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 9 to 35 ft | dawn | Deep basin (30 ft) | White tube jig, Airplane jig |
The chart marks 4 structure features on Lake Marion; the deepest is Deep basin at about 30 ft.
Season dates, license requirements, and size and bag limits for Wyoming waters are set by the Wyoming Game and Fish Department — and special regulations can apply to Lake Marion specifically, so confirm the current rules before you fish.
Check the official Wyoming fishing regulations →
Lake Marion is about 35 ft (11 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 brook trout, lake trout on Lake Marion.
Deep basin is the top-rated area: a deep basin in about 30 ft of water that rates prime for lake trout in summer. The interactive chart above rates every spot for each species and season.
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.
Fishing on Lake Marion is regulated by the Wyoming Game and Fish Department. Check the official Wyoming regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Mistymoon Lake 1 mi · Lake Helen 1 mi · Florence Lake 2 mi · Lake Solitude 3 mi · Lily Lake 4 mi · Mirror Lake 4 mi · Grace Lake 4 mi · West Tensleep Lake 5 mi · Crater Lake 5 mi · Lost Twin Lake 1 5 mi · Lost Lake 6 mi · Cliff Lake 6 mi
See how Lake Marion stacks up: best lake trout lakes in Wyoming · best brook trout lakes in Wyoming
More water nearby: Big Horn County fishing maps (25 charts). Browse all Wyoming 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.