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15-acre lake in Musselshell County, Montana. The lake tops out around 12 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 follows comes from the same scoring engine that paints the spots above.
Traced from the shoreline, Big Wall Pond runs 15 acres with 0.6 miles of edge. A shoreline index of 1.1 says round and simple: fish relate to depth changes here, not shoreline features. Every acre of it sits shallower than ~15 ft: one big littoral zone, cover and forage throughout. You'll find it in Musselshell County. The nearest mapped water is Lake Elmo, 52 mi to the south.
The spring pattern is a shallow one: rainbow trout in 3 to 12 ft. The depth story barely changes: 3 to 12 ft through summer, 2 to 12 ft in winter. Top water on the chart: Break off the point, a drop-off in the 6 ft range, prime in winter. Time it for early morning and the evening. Summer baits: a dodger + spoon (deep troll) or a flutter spoon gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dawn & dusk | Main-lake point (3 ft) | Inline spinner (silver), Small spoon |
| Summer | 3 to 12 ft | dawn & dusk | Break off the point (6 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 3 to 12 ft | dawn & dusk | Main-lake point (3 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 2 to 12 ft | dawn | Break off the point (6 ft) | Jigging spoon, Tube jig (white) |
In spring, largemouth bass run shallow here, mostly 2 to 10 ft. Midsummer fish sit out in 4 to 12 ft before dropping to 4 to 12 ft for winter. Fall largemouth bass concentrate at Main-lake point, a prime-rated point around 3 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a texas-rigged 10" worm or a deep-diving crankbait most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Main-lake point (3 ft) | Spinnerbait, Chatterbait |
| Summer | 4 to 12 ft | dawn & dusk | Break off the point (6 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 3 to 12 ft | midday & dawn | Main-lake point (3 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 4 to 12 ft | midday | Break off the point (6 ft) | Blade bait, Jigging spoon |
3 pieces of structure are mapped here — Deep basin, around 10 ft, is the deepest of them.
Season dates, license requirements, and size and bag limits for Montana waters are set by the Montana Fish, Wildlife & Parks — and special regulations can apply to Big Wall Pond specifically, so confirm the current rules before you fish.
Check the official Montana fishing regulations →
Big Wall Pond is about 12 ft (4 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 rainbow trout, largemouth bass on Big Wall Pond.
Main-lake point is the top-rated area: a point in about 3 ft of water that rates prime for largemouth bass in fall. The interactive chart above rates every spot for each species and season.
For rainbow 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 Big Wall Pond is regulated by the Montana Fish, Wildlife & Parks. Check the official Montana regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Lake Elmo 52 mi · Crystal Lake (Fergus) 54 mi · Lake Josephine 59 mi · Joels Pond 59 mi · Laurel Pond 67 mi · Ackley Lake 77 mi · Current Reservoir 81 mi · Bighorn River 83 mi · Yellowtail Afterbay Reservoir 91 mi · Yellowstone River 93 mi · Castle Rock Reservoir 97 mi · Fort Peck Lake 98 mi
See how Big Wall Pond stacks up: best largemouth bass lakes in Montana · best rainbow trout lakes in Montana
Browse all Montana 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.