Lake depth chart
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45-acre lake near Hubbard County. The lake tops out around 19 ft. The depth chart comes from Minnesota Department of Natural Resources bathymetric survey data, so the contours are survey-derived rather than computer-modeled. The depth data here comes from the Minnesota DNR survey of 1962, a decades-old survey (the DNR's original lake-survey map). The season-by-season read for each species follows, from the map's own numbers.
Drawn out, this is 45 acres of water rimmed by 1.3 miles of bank. At index 1.4 the outline is almost a bowl — read the depth changes, not the shoreline. Nothing on this chart breaks 15 ft, which makes the whole surface littoral: weeds, bait and ambush cover everywhere. End to end it runs roughly 0.3 mi, about 0.3 mi across. The water lies in Hubbard County. For a second option, Boulder lies 1 mi west.
When the water first warms, yellow perch slide up into 3 to 12 ft. By summer they slide out to 6 to 19 ft, and by winter most fish are in 6 to 19 ft. If you only fish one area, make it Deep basin: a deep basin around 5 ft that scores prime in fall. In summer the feeding windows fall in early morning. Keep a drop-shot micro plastics or a small spoon tipped with worm rigged through the warm months.
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 (1 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 6 to 19 ft chart-limited; documented 10 to 30 ft | dawn | Deep basin (5 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 6 to 19 ft chart-limited; documented 12 to 35 ft | midday | Deep basin (5 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 6 to 19 ft chart-limited; documented 15 to 35 ft | midday & dawn | Deep basin (5 ft) | Tungsten jig + spikes, Rattle spoon (small) |
The spring pattern is a shallow one: northern pike in 2 to 8 ft. As the season builds they drop to 6 to 19 ft, wintering in 5 to 15 ft. Top water on the chart: Shallow bay flat, a weed flat in the 1 ft range, prime in spring. Time it for early morning and the evening. Summer baits: a bucktail or a weedless spoon over cabbage 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 | 2 to 8 ft | midday & dawn | Shallow bay flat (1 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 6 to 19 ft chart-limited; documented 8 to 20 ft | dawn & dusk | Break off the point (5 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Break off the point (5 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Break off the point (5 ft) | Tip-ups, Large jigging spoon |
Start shallow in spring: largemouth bass sit in 2 to 10 ft that time of year. Summer pushes them deeper, 6 to 19 ft, and winter fish settle into 6 to 19 ft. The spot to know is Break off the point, a drop-off in about 5 ft of water that rates prime for largemouth bass in winter. Warm-month bites cluster around early morning and the evening. Throw a texas-rigged 10" worm or a deep-diving crankbait until the fish tell you otherwise.
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 (1 ft) | Spinnerbait, Chatterbait |
| Summer | 6 to 19 ft chart-limited; documented 8 to 20 ft | dawn & dusk | Break off the point (5 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Main-lake point (1 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 6 to 19 ft chart-limited; documented 15 to 35 ft | midday | Break off the point (5 ft) | Blade bait, Jigging spoon |
Spring rock bass on Round hold shallow, usually 2 to 10 ft. By summer they slide out to 5 to 19 ft, and by winter most fish are in 6 to 19 ft. The chart's best answer is Break off the point — drop-off, 5 ft, prime for fall. Prime time lands in the evening. The summer box starts with a ned rig (small) or a marabou jig.
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 | midday & dawn | Main-lake point (1 ft) | 1/16 oz jig + grub, Small inline spinner |
| Summer | 5 to 19 ft chart-limited; documented 5 to 20 ft | dusk | Break off the point (5 ft) | Ned rig (small), Marabou jig |
| Fall | 6 to 19 ft chart-limited; documented 8 to 22 ft | midday | Break off the point (5 ft) | Small tube jig, Inline spinner |
| Winter | 6 to 19 ft chart-limited; documented 12 to 30 ft | midday | Deep basin (5 ft) | Tungsten jig + plastic, Small spoon + spike |
The spring pattern is a shallow one: crappie in 2 to 8 ft. As the season builds they drop to 6 to 19 ft, wintering in 6 to 19 ft. Top water on the chart: Deep basin, a deep basin in the 5 ft range, prime in winter. Time it for early morning and the evening. Summer baits: a jig trolled/spider-rigged or a small 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 | 2 to 8 ft | midday & dawn | Shallow bay flat (1 ft) | 1/16 oz jig + tube, Curly-tail grub |
| Summer | 6 to 19 ft chart-limited; documented 10 to 25 ft | dawn & dusk | Break off the point (5 ft) | Jig trolled/spider-rigged, Small crankbait (trolled) |
| Fall | 6 to 19 ft chart-limited; documented 8 to 20 ft | dawn | Break off the point (5 ft) | Jig + minnow combo, Small swimbait (1.5-2") |
| Winter | 6 to 19 ft chart-limited; documented 15 to 35 ft | midday | Deep basin (5 ft) | Tungsten jig + soft plastic, Tiny jigging spoon |
Spring puts bluegill in skinny water — 1 to 6 ft is the zone. As the season builds they drop to 4 to 15 ft, wintering in 6 to 19 ft. Spring bluegill concentrate at Shallow bay flat, a prime-rated weed flat around 1 ft. Warm-month bites cluster around early morning and the evening. A small sponge spider (fly) or a micro tube jig covers the summer program.
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 | 1 to 6 ft | midday & dusk | Shallow bay flat (1 ft) | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 4 to 15 ft | dawn & dusk | Shallow bay flat (1 ft) | Small sponge spider (fly), Micro tube jig |
| Fall | 6 to 18 ft | midday | Break off the point (5 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 6 to 19 ft chart-limited; documented 10 to 25 ft | midday | Deep basin (5 ft) | Tungsten ice jig + plastic, Tiny spoon |
Round also holds pumpkinseed (2 to 10 ft in summer), brown bullhead (3 to 12 ft in summer), yellow bullhead (3 to 15 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Count 5 structure marks on this chart. The deepest, Deep basin, sits near 5 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 Round specifically, so confirm the current rules before you fish.
Check the official Minnesota fishing regulations →
Round is about 19 ft (6 m) deep at its deepest point. The depth data here comes from the Minnesota DNR survey of 1962, a decades-old survey (the DNR's original lake-survey map).
Anglers target yellow perch, northern pike, largemouth bass, rock bass, crappie, bluegill, pumpkinseed, brown bullhead, yellow bullhead on Round.
Shallow bay flat is the top-rated area: a weed flat in about 1 ft of water that rates prime for bluegill in spring. The map above holds the full rated-spot list for every species and season.
For yellow perch, 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 Round 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.
Boulder 1 mi · Clausens 1 mi · Little Sand 2 mi · Shallow 2 mi · Belle Taine 2 mi · Ida 2 mi · Deer 2 mi · Gilmore 2 mi · Loon 3 mi · Spider (NE/SW Bay) 3 mi · Big Sand 3 mi · Crow Wing 3 mi
See how Round stacks up: best largemouth bass lakes in Minnesota · best northern pike lakes in Minnesota · best crappie lakes in Minnesota · best bluegill lakes in Minnesota
More water nearby: Hubbard County fishing maps (109 charts). Browse all Minnesota fishing maps. See every water on DepthScout. Bathymetry: published agency survey data. 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.