Lake depth chart
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19-acre lake near St. Louis County. The lake tops out around 27 ft. The contours are modeled from the water's real shoreline and maximum depth. Treat them as a rough guide, and never use them for navigation. Species by species, here's what the data says the year looks like.
Mirror maps at 19 acres behind 0.7 miles of shoreline. The basin is a simple one (shoreline index 1.2) — close to a bowl, so the structure on the chart matters more than the bank. Littoral water — the productive band under ~15 ft — makes up 40% of this chart, as modeled. Call it 0.3 mi long by 0.2 mi wide at the broadest reach. St. Louis County claims this one. If the bite dies, Sunshine is 2 mi to the northeast.
The spring pattern is a shallow one: brown trout in 3 to 25 ft. As the season builds they drop to 8 to 27 ft, wintering in 4 to 27 ft. Top water on the chart: Shoreline break, a drop-off in the 12 ft range, prime in summer. Time it for after dark and early morning. Summer baits: a spoon at the thermocline or a deep stickbait (night) 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 | 3 to 25 ft | dawn & dusk | Shoreline break (12 ft) | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 8 to 27 ft chart-limited; documented 25 to 60 ft | night & dawn | Shoreline break (12 ft) | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 5 to 27 ft chart-limited; documented 5 to 30 ft | dusk & dawn | Shoreline break (12 ft) | Jerkbait over gravel, Casting spoon |
| Winter | 4 to 27 ft chart-limited; documented 5 to 35 ft | dawn | Shoreline break (12 ft) | Jigging spoon, Small stickbait (slow) |
The spring pattern is a shallow one: walleye in 4 to 15 ft. As the season builds they drop to 8 to 27 ft, wintering in 8 to 27 ft. Top water on the chart: Shoreline break, a drop-off in the 12 ft range, prime in fall. Time it for the evening and early morning. Summer baits: a crawler harness on bottom bouncer or a deep crankbait (trolled) 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 | 4 to 15 ft | dusk & dawn | Shoreline break (12 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 8 to 27 ft chart-limited; documented 15 to 35 ft | dusk & dawn | Shoreline break (12 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 8 to 27 ft chart-limited; documented 12 to 40 ft | dusk & night | Shoreline break (12 ft) | Jigging rap, Jig + big minnow |
| Winter | 8 to 27 ft chart-limited; documented 20 to 40 ft | dusk & dawn | Deep basin (23 ft) | Jigging spoon + minnow head, Rattle bait |
In spring, yellow perch run shallow here, mostly 3 to 12 ft. Summer pushes them deeper, 8 to 27 ft, and winter fish settle into 8 to 27 ft. Shallow bay flat is the standout, a weed flat at roughly 3 ft, rated prime for spring yellow perch. Time it for early morning. You won't need more than a drop-shot micro plastics or a small spoon tipped with worm most summer days.
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 | 3 to 12 ft | midday & dawn | Shallow bay flat (3 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 8 to 27 ft chart-limited; documented 10 to 30 ft | dawn | Deep basin (23 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 8 to 27 ft chart-limited; documented 12 to 35 ft | midday | Deep basin (23 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 8 to 27 ft chart-limited; documented 15 to 35 ft | midday & dawn | Deep basin (23 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Early season northern pike use the shallows, holding in 2 to 8 ft. Expect a summer slide to 8 to 20 ft, then a winter hold in 5 to 15 ft. Put Shallow bay flat first on the milk run — a weed flat near 3 ft that grades prime for spring. In summer the feeding windows fall in early morning and the evening. Tie on a bucktail or a weedless spoon over cabbage and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (3 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Shoreline break (12 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Shoreline break (12 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Shallow bay flat (3 ft) | Tip-ups, Large jigging spoon |
Spring largemouth bass on Mirror hold shallow, usually 2 to 10 ft. By summer they slide out to 8 to 20 ft, and by winter most fish are in 8 to 27 ft. The chart's best answer is Shallow bay flat — weed flat, 3 ft, prime for spring. Prime time lands in early morning and the evening. The summer box starts with a texas-rigged 10" worm or a deep-diving crankbait.
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 | 2 to 10 ft | dawn & dusk | Shallow bay flat (3 ft) | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | Shoreline break (12 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Shallow bay flat (3 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 8 to 27 ft chart-limited; documented 15 to 35 ft | midday | Shoreline break (12 ft) | Blade bait, Jigging spoon |
Early season crappie use the shallows, holding in 2 to 8 ft. Expect a summer slide to 10 to 25 ft, then a winter hold in 8 to 27 ft. Put Deep basin first on the milk run — a deep basin near 23 ft that grades prime for winter. In summer the feeding windows fall in early morning and the evening. Tie on a jig trolled/spider-rigged or a small crankbait (trolled) and you're in the game.
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 | 2 to 8 ft | midday & dawn | Shallow bay flat (3 ft) | 1/16 oz jig + tube, Curly-tail grub |
| Summer | 10 to 25 ft | dawn & dusk | Shoreline break (12 ft) | Jig trolled/spider-rigged, Small crankbait (trolled) |
| Fall | 8 to 20 ft | dawn | Shoreline break (12 ft) | Jig + minnow combo, Small swimbait (1.5-2") |
| Winter | 8 to 27 ft chart-limited; documented 15 to 35 ft | midday | Deep basin (23 ft) | Tungsten jig + soft plastic, Tiny jigging spoon |
Mirror also holds bluegill (4 to 15 ft in summer), pumpkinseed (2 to 10 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Count 4 structure marks on this chart. The deepest, Deep basin, sits near 23 ft.
Season dates, license requirements, and size and bag limits for Minnesota waters are set by the Minnesota DNR — and special regulations can apply to Mirror specifically, so confirm the current rules before you fish.
Check the official Minnesota fishing regulations →
Mirror is about 27 ft (8 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 brown trout, walleye, yellow perch, northern pike, largemouth bass, crappie, bluegill, pumpkinseed on Mirror.
Shoreline break is the top-rated area: a drop-off in about 12 ft of water that rates prime for walleye in fall. The map above holds the full rated-spot list for every species and season.
For brown trout, the summer bite is best in after dark and 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 Mirror 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.
Sunshine 2 mi · Flowage 2 mi · Fish Lk Flowage(East Bay) 2 mi · Clearwater 2 mi · Cameron 2 mi · Schultz 3 mi · Horseshoe 3 mi · Island Lake Rsvr(W.Basin) 4 mi · Jacobs 4 mi · Wild Rice 5 mi · Fish Lk Flowage(Main Bas) 5 mi · Island Lake Rsvr(E.Basin) 5 mi
See how Mirror stacks up: best largemouth bass lakes in Minnesota · best walleye lakes in Minnesota · best northern pike lakes in Minnesota · best crappie 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.