 Approximately half of the catchment area is occupied by the settlements and roads of Älta, located within Nacka, with the remaining area composed of forests, wetlands, and smaller patches of open terrain.In the northern part, forming the southern part of the open-air area, is a deciduous hardwood forest.South of the lake is the traffic route Tyresövägen receiving some 20,000 vehicles per day, and west of the road is a speedway track.