Judarskogen, Nature reserve in Bromma district, Stockholm, Sweden

Judarskogen is a nature reserve in Stockholm's Bromma district, made up of a lake, wetlands, meadows, and mixed forest. A network of walking paths connects all these sections and allows visitors to move between the different types of terrain.

Judarskogen was laid out as a nature park in the early 20th century and became an outdoor reserve in 1932, when the State Unemployment Commission built paths and gravel roads through the forest. It has been a municipal nature reserve since 1995 and is also a Natura 2000 area.

The reserve takes its name from Lake Judarn, which the sources derive from the Swedish word ljuda, "to sound". On the western edge, near Ängbybadet, stands Torpet Lugnet, a knuttimrad cottage with a 1760s tiled stove; the Bromma girl scouts used it in the 1930s and Nockeby scout corps in the 1950s and 1960s. The Lilla Gillet larp association now manages it.

Some parts of the reserve are wet and uneven, so sturdy footwear is a good idea before heading in. Information signs along the trails explain the glacial formations visible in the terrain.

North of Lake Judarn, Stockholm's street office built a pond specifically for newts and other amphibians, and the Natura 2000 management plan names the greater crested newt as the species to benefit. The reserve also protects De Geer moraines, ridges left by the retreating ice sheet.