Färnebofjärden National Park and nature reserves in Västmanland County

From Lake Mälaren towards Bergslagen

Southern Västmanland belongs to the broad Mälaren lowlands, where farmland, veteran oaks, shore meadow and shallow bays cluster around the lake. The ground rises and becomes more heavily wooded to the north. The Hedströmmen, Kolbäcksån and other valleys connect the regions: water drains south while eskers, routes and historic ironworking communities follow the same corridors.

The ridges record glacial meltwater carrying stone, gravel and sand through tunnels below the ice. When the current slowed, these deposits formed long raised lines across the lower country. Flowing water later powered Bergslagen’s iron industry, tying rapids and woodland resources to the growth of settlements throughout the valleys.

Floodplain, veteran oak and running water

Färnebofjärden National Park is shared with Dalarna, Gävleborg and Uppsala counties. The Lower Dalälven spreads into shallow lakes, short rapids and more than two hundred islands and skerries. Repeated floods sustain natural river meadows and floodplain woodland, where northern conifer and mire communities overlap with oak, lime and other southern trees.

At Strömsholm, centuries of grazing and horse keeping preserved sunlit oaks several hundred years old. More than 170 threatened or declining species are associated with these veterans. Shore meadow and reedbeds add wet habitats beside the pasture, and the rare asp fish gathers to spawn in rapids below the palace in spring.

The Hedströmmen carries the story northward. Clear water moves between ravines and lush broadleaved woodland. Freshwater pearl mussels depend on both clean riverbeds and trout, whose gills host their larvae during early development. Foundations, mill channels and slag beside the stream show how iron forges once relied on the same current.

A landscape with a new starting date

Hälleskogsbrännan changed far more abruptly. The great fire of 2014 killed nearly every tree across large areas and consumed parts of the soil layer. Species adapted to charred ground and burnt timber arrived soon afterwards. Fire geranium seed that had remained dormant below ground germinated in thousands after the heat, yet the flowers disappeared again within two years.

Insect larvae in dead trees drew woodpeckers, including three-toed woodpeckers previously seen only rarely in the county. Shrubs and young trees are now spreading. A century after the fire, the reserve is expected to carry wilder and more varied forest than before. Together, the four sites reveal Västmanland shaped by slow floods, centuries of land use, moving water and several extraordinary summer days.