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Rating depth structure for zander.
Recent public catches load as you reach this section.
1,812-acre lake in Finland. The lake tops out around 45 m. The depth chart comes from Finnish Environment Institute (Syke) bathymetric survey data, so the contours are survey-derived rather than computer-modeled. What follows comes from the same scoring engine that paints the spots above.
Vesi piirtyy 742 hehtaarin laajuisena, rantaa 18 km. Rantaviiva on kohtalaisen rikkonainen (indeksi 1.9). Noin 34% pinnasta on matalampaa kuin ~5 m — siellä ruokaketju elää. Päästä päähän vesi mittaa noin 4.7 km, leveimmillään 2.9 km. Vesi sijaitsee alueella Kuopio sub-region. Lähin kartoitettu vesi on Honka-Jälä, 4.8 km länteen.
Ilmainen interaktiivinen kalastuskartta — Iso-Jälä, Suomi: syvyyskäyrät todellisista syvyysmittauksista 45 metriin (148 jalkaa) asti, parhaat kalapaikat lajeille ahven, hauki, kuha ja muut. Syvyyskäyrät perustuvat Syken todellisiin syvyysmittauksiin (CC BY 4.0). Käytä karttaa suuntaa-antavana, älä koskaan navigointiin.
Early season european perch use the shallows, holding in 1 to 3.5 m. Expect a summer slide to 2.5 to 8.5 m, then a winter hold in 3.5 to 10 m. Put Shallow bay flat first on the milk run — a weed flat near 1 m that grades prime for spring. In summer the feeding windows fall in early morning. Tie on a drop-shot micro plastics or a small crankbait (perch pattern) and you're in the game.
| Kausi | Syvyys | Paras aika | Aloita | Vieheet |
|---|---|---|---|---|
| Kevät | 1 to 3.5 m | midday & dawn | Shallow bay flat (1 m) | Small jig + curly tail, Inline spinner #1-2 |
| Kesä | 2.5 to 8.5 m | dawn | Shallow bay flat (1 m) | Drop-shot micro plastics, Small crankbait (perch pattern) |
| Syksy | 3 to 10 m | midday | open water | Jigging spoon (small), Drop-shot on deep flats |
| Talvi | 3.5 to 10 m | midday & dawn | Feeding flat (11 m) | Tungsten jig + maggots, Small balance jig |
Come spring, look for northern pike tight to the bank in 0.5 to 2.5 m. Expect a summer slide to 2.5 to 6 m, then a winter hold in 1.5 to 4.5 m. Start at Shallow bay flat. It's a weed flat holding about 1 m of water and rates prime come spring. Prime time lands in early morning and the evening. A bucktail or a weedless spoon over cabbage is the honest summer answer here.
| Kausi | Syvyys | Paras aika | Aloita | Vieheet |
|---|---|---|---|---|
| Kevät | 0.5 to 2.5 m | midday & dawn | Shallow bay flat (1 m) | #5 inline spinner, Spoon (red/white) |
| Kesä | 2.5 to 6 m | dawn & dusk | Secondary point (2 m) | Bucktail, Weedless spoon over cabbage |
| Syksy | 2 to 5.5 m | midday & dawn | Secondary point (2 m) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Talvi | 1.5 to 4.5 m | midday | Shallow bay flat (1 m) | Tip-ups, Large jigging spoon |
Early season zander use the shallows, holding in 1 to 4.5 m. Expect a summer slide to 4.5 to 11 m, then a winter hold in 6 to 12 m. Put Secondary point first on the milk run — a point near 2 m that grades prime for spring. In summer the feeding windows fall in the evening and early morning. Tie on a vertical softbait over humps or a deep crankbait and you're in the game.
| Kausi | Syvyys | Paras aika | Aloita | Vieheet |
|---|---|---|---|---|
| Kevät | 1 to 4.5 m | dusk & dawn | Secondary point (2 m) | Softbait on jighead (10-12 cm), Shallow crankbait at dusk |
| Kesä | 4.5 to 11 m | dusk & dawn | Feeding flat (11 m) | Vertical softbait over humps, Deep crankbait |
| Syksy | 3.5 to 12 m | dusk & night | Secondary point (2 m) | Big softbait (12-16 cm) slow-rolled, Jigging spoon |
| Talvi | 6 to 12 m | dusk & dawn | open water | Vertical jig / mormyshka with bait, Slow blade bait |
The spring pattern is a shallow one: lake whitefish in 4.5 to 14 m. Midsummer fish sit out in 12 to 27 m before dropping to 7.5 to 21 m for winter. The spot to know is Feeding flat, a feeding flat in about 11 m of water that rates prime for lake whitefish in spring. Plan around early morning in the warm months. Summer baits: a blade bait vertical or a small jigging spoon gets it done.
| Kausi | Syvyys | Paras aika | Aloita | Vieheet |
|---|---|---|---|---|
| Kevät | 4.5 to 14 m | midday & dawn | Feeding flat (11 m) | Small jig + waxworm, Blade bait (small) |
| Kesä | 12 to 27 m | dawn | Feeding flat (11 m) | Blade bait vertical, Small jigging spoon |
| Syksy | 2.5 to 9 m | dusk | Secondary point (2 m) | Small spoon (gold), Jig + plastic larva |
| Talvi | 7.5 to 21 m | midday & dawn | Feeding flat (11 m) | Jigging spoon + bead chain, Tungsten jig + waxie |
Come spring, look for burbot tight to the bank in 7.5 to 21 m. They move out to 15 to 37 m in summer and finish the year down in 4.5 to 18 m. If you only fish one area, make it Deep basin: a deep basin around 44 m that scores good in summer. Best bite is after dark and midday. A heavy jig + cut bait is the honest summer answer here.
| Kausi | Syvyys | Paras aika | Aloita | Vieheet |
|---|---|---|---|---|
| Kevät | 7.5 to 21 m | night & dusk | open water | Glow jigging spoon + cut bait, Rattle bait (dark) |
| Kesä | 15 to 37 m | night & midday | Deep basin (44 m) | Heavy jig + cut bait |
| Syksy | 9 to 24 m | night & dusk | open water | Glow spoon + minnow head, Blade bait (slow) |
| Talvi | 4.5 to 18 m | night & dusk | open water | Glow tungsten + cut bait, Rattle spoon + minnow head |
Count 7 structure marks on this chart. The deepest, Deep basin, sits near 44 m.
Season dates, license requirements, and size and bag limits for Finland waters are set by the Kalastusrajoitus.fi (official Finnish restriction service) — and special regulations can apply to Iso-Jälä specifically, so confirm the current rules before you fish.
Check the official Finland fishing regulations →
Iso-Jälä is about 148 ft (45 m) deep at its deepest point. The depth chart comes from Finnish Environment Institute (Syke) bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Iso-Jälä on syvimmillään noin 45 metriä (148 jalkaa). Syvyydet perustuvat todellisiin luotauksiin.
Anglers target european perch, northern pike, zander, lake whitefish, burbot on Iso-Jälä. 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 4 ft of water that rates prime for european perch in spring. The map above holds the full rated-spot list for every species and season.
For european 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 Iso-Jälä is regulated by the Kalastusrajoitus.fi (official Finnish restriction service). Check the official Finland regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Honka-Jälä 4.8 km · Sourunlampi 6.4 km · Tihvonjärvi 8 km · Juurusvesi-Akonvesi 14.5 km · Suuri-Pieksä 14.5 km · Haluna 17.7 km · Ylä-Pieksä 19.3 km · Kauppinen 19.3 km · Honkanen 19.3 km · Mikkajärvi 22.5 km · Matkus 22.5 km · Niitty-Pölläkkä 24.1 km
See how Iso-Jälä stacks up: best zander lakes in Finland · best northern pike lakes in Finland · best european perch lakes in Finland · best lake whitefish lakes in Finland
More water nearby: Kuopio sub-region fishing maps (20 charts). Browse all Finland fishing maps. See every water on DepthScout. Bathymetry credit: Finnish Environment Institute (Syke), Järvien ja jokien syvyysaineisto, CC BY 4.0. 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.