Onsängssjön

clear oligotrophic forest lake · 62°N

Real lakereal shoreline9 species on recordsources & method →

clarity 8.4 mmax depth 7 mpH 6.7oligotrophicstatus goodforest track · 22 min for the last stretch

Character of the water

Onsängssjön lies in central Sweden — a clear oligotrophic forest lake. The water is crystal-clear and the fish skittish in the sharp light.

The surroundings

The lake lies remote, ringed by forest and bog far from any road. Few find their way here — the water is untouched and the stock undisturbed.

Moderately deep (7 m) — shallow bays, the odd reef and a deeper channel through the middle.

Permits & rules

Fishing permit required — Onsängssjön FVOF. Day permit ~140 kr · annual permit ~700 kr.

Zander: minimum size 45 cm · protected during the spawn (Apr–May).
Pike: keep at most one over 75 cm per day.
Handheld tackle only. Respect the protected zones at the inlets and outlets.

Species in Onsängssjön

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.

björkna fish

typically ~18 cm · can reach 35 cm

Björkna holds the bottom even in clear water — shade and depth are its cover.

bream coarse fish

typically ~38 cm · can reach 65 cm

Bream holds the bottom even in clear water — shade and depth are its cover.

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.

ruffe perch family

typically ~12 cm · can reach 22 cm

Ruffe holds the bottom even in clear water — shade and depth are its cover.

zander predatory fish

typically ~50 cm · can reach 95 cm

Zander is a sight-hunter here — the clear water means long follows before the take.

grayling fish

typically ~30 cm · can reach 50 cm

Here grayling lives on the small stuff — and rewards those who fish small and fine.

id fish

typically ~38 cm · can reach 75 cm

Here id lives on the small stuff — and rewards those who fish small and fine.

burbot bottom fish

typically ~45 cm · can reach 90 cm

Burbot lives down in the cool — the deep is its home ground all year.

Fishing Onsängssjön

perch, pike and zander sit at the top of the food chain in Onsängssjön, carried by björkna, bream and ruffe. The clearer water makes the fish wary — and rewards a careful presentation.

Whoever fishes Onsängssjön regularly builds something of their own: a log of what took, where and when. That's how the water gives up its patterns — cast by cast, never all at once.

General rules of thumb for this kind of water

Clear water makes fish light-shy — dawn, dusk and night are usually best.

The catch board

6 anglers · 12 catches

1Karl Månssonzander48 cm
2Hanna Åströmburbot41 cm
3Nils Åbergzander40 cm
4Magnus Hedlundbream31 cm
5Wolfgang Brandtperch18 cm
6Mikko Norénperch18 cm

Species records here

zander48 cmKarl Månsson

burbot41 cmHanna Åström

bream31 cmMagnus Hedlund

perch18 cmWolfgang Brandt

The same water, for real

This water's real catch reports — and the logbook for your own.Fångstrapport.sein Swedish

The real bite table for this water — for your next real session.Huggtabell.sein Swedish