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Jon-Mastjärnen

northern mesotrophic lake · 64°N
Real lakereal shorelinesources & method →
clarity 5.0 mmax depth 7 mpH 7.0mesotrophicstatus goodpaved road
Fish Jon-Mastjärnen Buy forecast

Character of the water

Jon-Mastjärnen lies in the cold north — a northern mesotrophic lake.

The surroundings

The lake sits close to town with a road right up to it — easy to reach, but hard-fished and exposed to nutrient runoff from the buildings and fields all around.

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

Permits & rules

Fishing permit required — Jon-Mastjärnen FVOF. Day permit ~100 kr · annual permit ~500 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 Jon-Mastjärnen

perch predatory fish
typically ~22 cm · can reach 45 cm
Perch moves carefully in the clear water — small mouthfuls, many of them.
pike predatory fish
typically ~62 cm · can reach 120 cm
In the clear water pike picks its moments — wary, but relentless once committed.
roach coarse fish
typically ~18 cm · can reach 32 cm
Roach moves carefully in the clear water — small mouthfuls, many of them.
zander predatory fish
typically ~50 cm · can reach 95 cm
In the clear water zander picks its moments — wary, but relentless once committed.
ruffe perch family
typically ~12 cm · can reach 22 cm
Ruffe lives down in the cool — the deep is its home ground all year.

Fishing Jon-Mastjärnen

The species list of Jon-Mastjärnen runs to 5. The predators — perch, pike and zander — hunt where the baitfish gather, and on a water this size you soon learn where it holds its fish.

Every session at Jon-Mastjärnen 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.

The catch board

6 anglers · 12 catches
  1. 1Klaus Olofssonpike53 cm
  2. 2Jonas Johansenpike51 cm
  3. 3Björn Falkpike50 cm
  4. 4Sara Johansenzander46 cm
  5. 5Lars Nilssonroach15 cm
  6. 6Stefan Olofssonruffe10 cm
Species records here
pike51 cmJonas Johansen
zander46 cmSara Johansen
roach15 cmLars Nilsson
ruffe10 cmStefan Olofsson
The same water, for real
This water's real catch reports — and the logbook for your own.Fångstrapport.sein SwedishThe real bite table for this water — for your next real session.Huggtabell.sein Swedish