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Rating depth structure for lake trout.
Recent public catches load as you reach this section.
108-acre lake near St. Louis County. The lake tops out around 50 ft. The contours come from a model of the real basin shape and its known max depth. Read them as probabilities, not soundings, and keep them out of navigation decisions. Species by species, here's what the data says the year looks like.
Traced from the shoreline, Fat runs 108 acres with 1.9 miles of edge. Its 1.3 shoreline index means few bank features; the contours below do the pattern work. About 39% of the surface sits shallower than 15 ft on the modeled chart — that's the weed-and-bait zone. The basin spans about 0.7 mi end to end and 0.5 mi across at its widest. You'll find it in St. Louis County. For a second option, Eugene lies 1 mi north.
The spring pattern is a shallow one: lake trout in 10 to 40 ft. Midsummer fish sit out in 15 to 50 ft before dropping to 13 to 50 ft for winter. The spot to know is Deep basin, a deep basin in about 43 ft of water that rates prime for lake trout in summer. Plan around early morning in the warm months. Summer baits: a white tube jig (deep) or a magnum spoon on downrigger gets it done.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | dawn & dusk | Main-lake point (13 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Summer | 15 to 50 ft chart-limited; documented 50 to 120 ft | dawn | Deep basin (43 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Fall | 10 to 50 ft | dusk & dawn | Main-lake point (13 ft) | Heavy casting spoon, Jigging rap over reefs |
| Winter | 13 to 50 ft chart-limited; documented 20 to 80 ft | dawn | Deep basin (43 ft) | White tube jig, Airplane jig |
6 pieces of structure are mapped here — Deep basin, around 43 ft, is the deepest of them.
Season dates, license requirements, and size and bag limits for Minnesota waters are set by the Minnesota DNR — and special regulations can apply to Fat specifically, so confirm the current rules before you fish.
Check the official Minnesota fishing regulations →
Fat is about 50 ft (15 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 lake trout on Fat.
Deep basin is the top-rated area: a deep basin in about 43 ft of water that rates prime for lake trout in summer. Scroll up to the map for the complete spot list by species and season.
For lake trout, the summer bite is best in early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Fat is regulated by the Minnesota DNR. Check the official Minnesota regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Eugene 1 mi · Steep 1 mi · Beartrack 1 mi · Little Loon 2 mi · Gun 3 mi · Finger 3 mi · Trygg 3 mi · Loon 4 mi, MN/ON · Lac la Croix 4 mi, ON/MN · Takucmich 4 mi · Heritage 4 mi · Pocket 5 mi
See how Fat stacks up: best lake trout lakes in Minnesota
More water nearby: St. Louis County fishing maps (429 charts). Browse all Minnesota fishing maps. 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.