Hällen is a swimming lake located in Bollnäs, Sweden. It is known for its natural setting, providing a recreational area for both locals and visitors. The lake features clear waters that are suitable for swimming during the warmer months, making it a popular spot for outdoor activities.
Surrounding Hällen, there are facilities that support various leisure activities, including areas for picnicking and sunbathing. The natural landscape offers a serene environment, contributing to the lake's appeal as a destination for relaxation and enjoyment of nature. The lake is also part of the local ecosystem, supporting various wildlife and plant species, which can be observed by nature enthusiasts.