Farum Lake (Farum Sø)

Forest-Framed Waters on Copenhagen’s Green Edge

Farum Lake stretches out in the Mølleå valley, a calm sheet of water framed by dense woodland on its southern and western shores and the town of Farum to the north. Despite its proximity to Copenhagen, it feels distinctly rural: reeds whisper along the banks, tall beech trees lean over the water, and the light shifts constantly across the lake’s surface. This is the third-largest lake in the Mølleå river system, fed by the Hestetangså stream and draining east via the short Fiskebæk into neighbouring Furesø. Motorboats are banned, so you hear oars, birds and wind rather than engines, which gives the entire basin a hushed, almost old-fashioned atmosphere.

Nature Reserve and Bird Sanctuary

Farum Lake forms part of a protected nature reserve between Farum and Slangerup, designated both as a habitat area and an EU bird protection site. That status has helped preserve a mosaic of wetlands, reed beds and mature forest that shelters an impressive variety of species. On still days you can watch ducks, grebes and swans threading quiet paths across the water, while diving ducks such as goldeneye and tufted duck often congregate in deeper areas. Marsh harriers circle low over the reeds in summer, and ospreys sometimes pause here on migration, using the lake as a hunting ground. Mink trapping and ongoing habitat management underline how actively the landscape is being looked after.

Legends of Islands and Lost Silver

Two small islands punctuate the lake: Svaneholm and the larger Klavs Nars Holm, the latter privately inhabited. Their low silhouettes and tree crowns break the horizon, adding a sense of mystery to the views from shore. Over centuries they have inspired stories blending royal courts, jesters and hidden wealth. Local lore tells of Klavs Nar, a jester in the service of King Valdemar IV, who was allegedly granted the island on the condition he built a house and lived there. Another tale speaks of a royal silver dinner service that slipped overboard from a boat returning from nearby Farumgård manor and disappeared into the depths. Whether or not the treasures are real, the legends add a playful narrative layer to an otherwise tranquil landscape.

Walking, Running and Rowing the Shoreline

The best way to experience Farum Lake is to follow the Farum Søsti, a roughly 10 km loop trail that circles the water. The path undulates gently through forest, along open stretches of shoreline and across occasional clearings that reveal wide lake panoramas. It suits walkers, runners and confident cyclists, with several benches and simple rest spots along the way. Every kilometre, carved stones by artist Olaf Johannisson appear beside the path, their reliefs depicting local animals and subtly guiding your progress. In places the trail overlaps with longer pilgrimage routes, so you may notice shell symbols and route markers hinting at journeys that reach far beyond the lake.

Summer Swims and Quiet Adventures

In warm weather, the northern shore near Farum becomes a relaxed bathing area, with informal access points where people wade in from the bank. The lake’s water quality has improved considerably over recent years, and while there are no lifeguards, confident swimmers often treat it as a natural outdoor pool. At the eastern end, small rowing boats can be hired in season, allowing you to explore coves and reed-fringed inlets at your own pace. Anglers are drawn to the lake’s deeper slopes and wooded banks, while families often opt for picnics in sun-dappled clearings. Even in winter, the path stays appealing for brisk walks under bare branches and low northern light.

Atmosphere Through the Seasons

Farum Lake changes character with the months. Spring brings birdsong and young green leaves; summer stretches long evenings of soft light over the water. Autumn cloaks the surrounding forest in copper and gold, reflected in rippled mirror images across the lake’s surface. On cold, clear days, the combination of crisp air, distant church towers from Farum and the still water gives the area an almost meditative feel. Whether you come for an hour’s stroll or a full circuit, the impression is of a compact landscape that manages to balance gentle recreation with real ecological value, making Farum Lake a rewarding green escape in North Zealand.