Iso Rautujärvi

Character of the water

Iso Rautujärvi lies in the cold north — a northern acidified forest lake. The water is crystal-clear and the fish skittish in the sharp light. In summer a thermocline settles around 9 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.

A small but surprisingly deep pocket (19 m) with steep drops straight down from shore — the bottom falls away fast.

Permits & rules

Fishing permit required — Iso Rautujärvi FVOF. Day permit ~60 kr · annual permit ~300 kr.

• Handheld tackle only. Respect the protected zones at the inlets and outlets.

Fishing Iso Rautujärvi

The species list of Iso Rautujärvi runs to 1. The predators — perch — hunt where the baitfish gather, and on a water this size you soon learn where it holds its fish.

Every session at Iso Rautujärvi 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

• Clear water makes fish light-shy — dawn, dusk and night are usually best.
• In deep, oxygenated lakes the predators seek cool depth in summer, shallower in spring and autumn.
• Acidified water yields few, hardy species.