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Grimsjön

acidified brown forest lake · 62°N
Real lakereal shoreline6 species on recordsources & method
clarity 1.3 mmax depth 12 mpH 5.5oligotrophic · humicstatus poorgravel road

Character of the water

Grimsjön lies in central Sweden — a acidified brown forest lake. The tea-stained, humic water hides the bottom within an arm's length. In summer a thermocline settles around 5 m and splits the lake into two worlds. Acidification has thinned life down to the hardiest few.

The surroundings

The lake lies half-remote, a fair way from the nearest road, tucked into woodland.

Moderately deep (12 m) — shallow bays, the odd reef and a deeper channel through the middle.

Permits & rules

Fishing permit required — Grimsjön 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 Grimsjön

perch predatory fish
typically ~22 cm · can reach 45 cm
The nutrient-rich water keeps perch moving constantly between the feeding grounds.
pike predatory fish
typically ~62 cm · can reach 120 cm
Pike hunts by feel more than sight in the stained water — short, hard strikes close to the bait.
grayling fish
typically ~30 cm · can reach 50 cm
The nutrient-rich water keeps grayling moving constantly between the feeding grounds.
trout salmonids
typically ~35 cm · can reach 70 cm
Trout hunts by feel more than sight in the stained water — short, hard strikes close to the bait.
regnbåge fish
typically ~35 cm · can reach 70 cm
In the murky light, regnbåge shadows the baitfish and hits in short rushes.
Arctic char salmonids
typically ~35 cm · can reach 70 cm
Arctic char hunts by feel more than sight in the stained water — short, hard strikes close to the bait.

Fishing Grimsjön

Grimsjön holds 6 species, with perch, pike and grayling at the top of the chain and regnbåge schooling beneath them. The modest depth keeps most of the fishing within reach of the bank.

Every session at Grimsjön is fished in whatever conditions hold right then — the same pressure, wind and light as over the real water. What bites today isn't what bit the day before, and those who return learn the water for real.

General rules of thumb for this kind of water

  • Brown, humic water dampens the light — fishing can be good even in the middle of the day.
  • Acidified water yields few, hardy species.

The catch board

6 anglers · 12 catches
  1. 1Sabine Sjöbergpike50 cm
  2. 2Mikael Petterssontrout30 cm
  3. 3Stefan Brandttrout29 cm
  4. 4Karl Månssonregnbåge29 cm
  5. 5Kjell Olofssongrayling25 cm
  6. 6Stefan Strandgrayling23 cm
Species records here
pike50 cmSabine Sjöberg
trout30 cmMikael Pettersson
regnbåge29 cmKarl Månsson
grayling25 cmKjell Olofsson
The same water, for real