Järnsjön
clear oligotrophic deep lake · 59°N
Real lakereal shorelinemeasured max depth 64 m9 species on recordreal water chemistrysources & method →
clarity 4.3 mmax depth 64 mpH 6.8oligotrophicstatus goodgravel road
Character of the water
Järnsjön lies in central Sweden — a clear oligotrophic deep lake.
The surroundings
The lake lies half-remote, a fair way from the nearest road, tucked into woodland.
Large and deep (64 m): a central basin ringed by drop-offs and shallow bays around the edges — varied bottom with many spots to read.
Permits & rules
Fishing permit required — Järnsjön FVOF. Day permit ~140 kr · annual permit ~700 kr.
- Pike: keep at most one over 75 cm per day.
- Trout & Arctic char: protected during the autumn spawn · catch-and-release on certain stretches.
- Handheld tackle only. Respect the protected zones at the inlets and outlets.
Species in Järnsjön
perch predatory fish
typically ~22 cm · can reach 45 cm
Here perch lives on the small stuff — and rewards those who fish small and fine.
ål fish
typically ~55 cm · can reach 110 cm
Ål lives down in the cool — the deep is its home ground all year.
pike predatory fish
typically ~62 cm · can reach 120 cm
Pike is a sight-hunter here — the clear water means long follows before the take.
burbot bottom fish
typically ~45 cm · can reach 90 cm
Burbot lives down in the cool — the deep is its home ground all year.
salmon fish
typically ~65 cm · can reach 130 cm
In the clear water salmon picks its moments — wary, but relentless once committed.
löja fish
typically ~12 cm · can reach 20 cm
Here löja lives on the small stuff — and rewards those who fish small and fine.
roach coarse fish
typically ~18 cm · can reach 32 cm
Here roach lives on the small stuff — and rewards those who fish small and fine.
trout salmonids
typically ~35 cm · can reach 70 cm
Trout is a sight-hunter here — the clear water means long follows before the take.
whitefish whitefish
typically ~30 cm · can reach 55 cm
Whitefish cruises the open water — the depth it picks follows the light through the day.
Fishing Järnsjön
The species list of Järnsjön runs to 9. The predators — perch, pike and burbot — hunt where the baitfish gather, and on a water this size every bay becomes its own fishery.
The fishing here follows the water's own rhythm: dawn and dusk have their windows, fronts close and open them, and the season moves the fish. No two sessions at Järnsjön are alike.
General rules of thumb for this kind of water
- In deep, oxygenated lakes the predators seek cool depth in summer, shallower in spring and autumn.
The catch board
- 1Wolfgang Korhonenål48 cm
- 2Wolfgang Åbergål45 cm
- 3Oskar Lehmanntrout29 cm
- 4Fredrik Björkwhitefish24 cm
- 5Emil Lundperch20 cm
- 6Torbjörn Häggroach14 cm
Species records here
ål48 cmWolfgang Korhonen
trout29 cmOskar Lehmann
whitefish24 cmFredrik Björk
perch20 cmEmil Lund
roach14 cmTorbjörn Hägg
The same water, for real
