Sillen

Sillen is a freshwater lake located where Södermanland and Stockholm counties meet in Sweden. The waters stretch across the landscape, connecting the municipalities of Gnesta and Södertälje on opposite shores.

The lake formed through natural geological processes and has shaped settlement patterns in the region for millennia. Its waters have served as a natural boundary and resource for nearby communities throughout history.

Local communities near Sillen have developed their activities around the lake, integrating water management practices into their daily routines and regional planning.

The lake can be accessed from several entry points in both municipalities, with parking areas near the shoreline. Visitors should note that conditions vary by season, and the surroundings are best explored on foot or by bike.

The lake functions as both a recreational water body and an essential part of the local watershed system, supporting diverse plant and animal populations.

GPS coordinates: 58.98574,17.34098

Latest update: December 14, 2025 09:44