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1,617-acre lake near Palo Alto County. Iowa DNR survey water. The lake tops out around 22 ft. The depth chart comes from published agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled. Every species below gets its seasonal read from the same numbers driving the chart.
Traced from the shoreline, Five Island Lake runs 1,617 acres with 9.5 miles of edge. The shoreline is moderately structured (index 1.7) — enough points and pockets to pattern. The shallow band under 15 ft claims about 98% of the surface — that's where the groceries are. Tip to tip the water measures near 4.6 mi with a 0.8-mi widest point. You'll find it in Palo Alto County. For a second option, Ingham Lake lies 12 mi north.
Start shallow in spring: largemouth bass sit in 2 to 10 ft that time of year. Warm water sends them out to 8 to 20 ft; cold water stacks them in 7 to 22 ft. Top water on the chart: Shallow bay flat, a weed flat in the 5 ft range, prime in spring. Fish it in early morning and the evening and you'll meet the bite. 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 (5 ft) | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | Shallow bay flat (5 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Main-lake point (2 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 7 to 22 ft chart-limited; documented 15 to 35 ft | midday | Deep basin (19 ft) | Blade bait, Jigging spoon |
Spring puts bluegill in skinny water — 1 to 6 ft is the zone. Warm water sends them out to 4 to 15 ft; cold water stacks them in 7 to 22 ft. Shallow bay flat is the standout, a weed flat at roughly 5 ft, rated prime for spring bluegill. Plan around early morning and the evening in the warm months. 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 (5 ft) | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 4 to 15 ft | dawn & dusk | Shallow bay flat (5 ft) | Small sponge spider (fly), Micro tube jig |
| Fall | 6 to 18 ft | midday | Shallow bay flat (5 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 7 to 22 ft chart-limited; documented 10 to 25 ft | midday | Deep basin (19 ft) | Tungsten ice jig + plastic, Tiny spoon |
The spring pattern is a shallow one: crappie in 2 to 8 ft. Midsummer fish sit out in 7 to 22 ft before dropping to 7 to 22 ft for winter. The spot to know is Deep basin, a deep basin in about 19 ft of water that rates prime for crappie in winter. Plan around early morning and the evening in the warm months. 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 (5 ft) | 1/16 oz jig + tube, Curly-tail grub |
| Summer | 7 to 22 ft chart-limited; documented 10 to 25 ft | dawn & dusk | Deep basin (19 ft) | Jig trolled/spider-rigged, Small crankbait (trolled) |
| Fall | 8 to 20 ft | dawn | Deep basin (19 ft) | Jig + minnow combo, Small swimbait (1.5-2") |
| Winter | 7 to 22 ft chart-limited; documented 15 to 35 ft | midday | Deep basin (19 ft) | Tungsten jig + soft plastic, Tiny jigging spoon |
When the water first warms, yellow perch slide up into 3 to 12 ft. Summer is a 7 to 22 ft game here, winter a 7 to 22 ft one. Start at Shallow bay flat. It's a weed flat holding about 5 ft of water and rates prime come spring. The feeding windows run 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 (5 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Summer | 7 to 22 ft chart-limited; documented 10 to 30 ft | dawn | Deep basin (19 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Fall | 7 to 22 ft chart-limited; documented 12 to 35 ft | midday | Deep basin (19 ft) | Jigging spoon (small), Perch rig / spreader |
| Winter | 7 to 22 ft chart-limited; documented 15 to 35 ft | midday & dawn | Deep basin (19 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Start shallow in spring: channel catfish sit in 3 to 12 ft that time of year. Warm water sends them out to 7 to 22 ft; cold water stacks them in 7 to 22 ft. Top water on the chart: Deep basin, a deep basin in the 19 ft range, prime in winter. Fish it in after dark and the evening and you'll meet the bite.
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 | dusk | Shallow bay flat (5 ft) | |
| Summer | 7 to 22 ft chart-limited; documented 8 to 25 ft | night & dusk | Deep basin (19 ft) | |
| Fall | 7 to 22 ft chart-limited; documented 10 to 30 ft | dusk | Deep basin (19 ft) | |
| Winter | 7 to 22 ft chart-limited; documented 20 to 40 ft | midday | Deep basin (19 ft) |
When the water first warms, walleye slide up into 4 to 15 ft. By summer they slide out to 7 to 22 ft, and by winter most fish are in 7 to 22 ft. If you only fish one area, make it Deep basin: a deep basin around 19 ft that scores prime in winter. In summer the feeding windows fall in the evening and early morning. Keep a crawler harness on bottom bouncer or a deep crankbait (trolled) 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 | 4 to 15 ft | dusk & dawn | Break off the point (4 ft) | 1/8 oz jig + minnow, Hair jig |
| Summer | 7 to 22 ft chart-limited; documented 15 to 35 ft | dusk & dawn | Deep basin (19 ft) | Crawler harness on bottom bouncer, Deep crankbait (trolled) |
| Fall | 7 to 22 ft chart-limited; documented 12 to 40 ft | dusk & night | Deep basin (19 ft) | Jigging rap, Jig + big minnow |
| Winter | 7 to 22 ft chart-limited; documented 20 to 40 ft | dusk & dawn | Deep basin (19 ft) | Jigging spoon + minnow head, Rattle bait |
Five Island Lake also holds smallmouth bass (7 to 22 ft in summer), white bass (7 to 22 ft in summer), northern pike (8 to 20 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Count 6 structure marks on this chart. The deepest, Deep basin, sits near 19 ft.
Access data: Iowa DNR — Boat Ramps. Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for Iowa waters are set by the Iowa DNR — and special regulations can apply to Five Island Lake specifically, so confirm the current rules before you fish.
Check the official Iowa fishing regulations →
Five Island Lake is about 22 ft (7 m) deep at its deepest point. The depth chart comes from published agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Anglers target largemouth bass, bluegill, crappie, yellow perch, channel catfish, walleye, smallmouth bass, white bass, northern pike on Five Island Lake. This isn't a survey of the water — none is published for it — but an informed estimate from the species common to the region, narrowed by this water's depth, size and each species' range.
Shallow bay flat is the top-rated area: a weed flat in about 5 ft of water that rates prime for largemouth bass in spring. The map above holds the full rated-spot list for every species and season.
For largemouth bass, 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 Five Island Lake is regulated by the Iowa DNR. Check the official Iowa regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Ingham Lake 12 mi · Virgin Lake 12 mi · Lost Island Lake 13 mi · Silver Lake (Palo Alto) 14 mi · Elk Lake 14 mi · Twelve Mile Lake 15 mi · West Swan Lake S.W.M.A. 15 mi · Trumbull Lake 15 mi · Pickeral Lake 21 mi · Lake Smith 21 mi · Okamanpeedan 26 mi, MN · Clear 26 mi, MN
See how Five Island Lake stacks up: best largemouth bass lakes in Iowa · best smallmouth bass lakes in Iowa · best walleye lakes in Iowa · best white bass lakes in Iowa
Browse all Iowa 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.