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Grundsjön

northern acidified brown forest lake · 65°N
Real lakereal shoreline8 species on recordsources & method
clarity 1.1 mmax depth 3 mpH 4.6oligotrophic · humicstatus poorgravel road

Character of the water

Grundsjön lies in the cold north — a northern acidified brown forest lake. The tea-stained, humic water hides the bottom within an arm's length. 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.

Shallow throughout (max 3 m), with reeds and vegetation over large areas — water that warms fast in spring.

Permits & rules

Fishing permit required — Grundsjön 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 Grundsjön

perch predatory fish
typically ~22 cm · can reach 45 cm
The nutrient-rich water keeps perch moving constantly between the feeding grounds.
elritsa fish
typically ~7 cm · can reach 12 cm
Elritsa grazes the rich water in schools — where there's one, there are more.
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.
burbot bottom fish
typically ~45 cm · can reach 90 cm
Down on the bottom burbot sifts the soft ground — patience beats speed here.
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.
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.
whitefish whitefish
typically ~30 cm · can reach 55 cm
Whitefish roams the open water after the feed — a moving target.

Fishing Grundsjön

perch, pike and grayling sit at the top of the food chain in Grundsjön, carried by elritsa and whitefish. The brown, humic water keeps visibility short — the fishing is more about vibration than sight.

Every session at Grundsjön 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. 1Anders Nilssontrout29 cm
  2. 2Johan Viklundwhitefish25 cm
  3. 3Mats Bergperch19 cm
  4. 4Fredrik Hedlundperch18 cm
  5. 5Jukka Sandströmelritsa6 cm
  6. 6Roland Holmelritsa5 cm
Species records here
trout29 cmAnders Nilsson
whitefish25 cmJohan Viklund
perch18 cmFredrik Hedlund
elritsa6 cmJukka Sandström
The same water, for real