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Rating depth structure for rainbow trout.
Shared by DepthScout anglers. Exact spots stay private, always.
7-acre lake in Polk County, Wisconsin. The lake tops out around 7 ft. Contours on this water are modeled from its actual shoreline and max depth. Good for finding likely water, never for navigation. Species by species, here's what the data says the year looks like.
The drawn water covers 7 acres wrapped in 0.5 miles of bank. The basin is a simple one (shoreline index 1.4) — close to a bowl, so the structure on the chart matters more than the bank. There is no deep basin to speak of — the entire surface is under ~15 ft, prime weed water end to end. It sits in Polk County. If the bite dies, Round Lake is 1 mi to the west.
When the water first warms, rainbow trout slide up into 2 to 7 ft. There's no big seasonal slide here — summer means 2 to 7 ft, winter 1 to 7 ft. If you only fish one area, make it Break off the point: a drop-off around 3 ft that scores prime in winter. In summer the feeding windows fall in early morning and the evening. Keep a dodger + spoon (deep troll) or a flutter spoon rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 7 ft | dawn & dusk | Main-lake point (7 ft) | Inline spinner (silver), Small spoon |
| Summer | 2 to 7 ft | dawn & dusk | Break off the point (3 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 2 to 7 ft | dawn & dusk | Main-lake point (7 ft) | Casting spoon, Jerkbait over shoals |
| Winter | 1 to 7 ft | dawn | Break off the point (3 ft) | Jigging spoon, Tube jig (white) |
The chart marks 3 structure features on Marlpit Spring; the deepest is Main-lake point at about 7 ft.
Season dates, license requirements, and size and bag limits for Wisconsin waters are set by the Wisconsin DNR — and special regulations can apply to Marlpit Spring specifically, so confirm the current rules before you fish.
Check the official Wisconsin fishing regulations →
Marlpit Spring is about 7 ft (2 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 rainbow trout on Marlpit Spring. These come from the Wisconsin DNR's per-lake fish listing; where the DNR lists a group (panfish, catfish, trout) the specific species are resolved from Wisconsin's fish distribution by the lake's location, depth and habitat.
Break off the point is the top-rated area: a drop-off in about 3 ft of water that rates prime for rainbow trout in winter. The map above holds the full rated-spot list for every 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 Marlpit Spring is regulated by the Wisconsin DNR. Check the official Wisconsin regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Round Lake 1 mi · Horse Lake 1 mi · Big Lake 1 mi · Mud Lake 1 mi · Wind Lake 2 mi · Horseshoe Lake 2 mi · Church Pine Lake 2 mi · Lotus Lake 3 mi · Rice Lake 3 mi · Paulsen Lake 4 mi · Swede Lake 4 mi · Sand Lake 4 mi
See how Marlpit Spring stacks up: best rainbow trout lakes in Wisconsin
More water nearby: Polk County fishing maps (118 charts). Browse all Wisconsin 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.