The somewhat circular lake has a diameter of about 3.2 kilometers, the area is 579 hectares and the greatest depth is about 13 meters. It was formed during the Ice Age and lies in a hollow in the Berlin glacial valley. It is one of the largest bodies of water in the Dahme-Heideseen Nature Park and is a popular water sports area. The lake is particularly ideal for sailors due to the good wind conditions. Sailing courses and sailing events are offered in the water sports center in the port of Blossin. Boat moorings and a very well-equipped boat rental are also part of the offer. Whether sailing, motor, rowing boat or canoe, dragon boat or even stand-up paddling boards - water sports enthusiasts are sure to find what they are looking for here.
For longer boat trips, the possibilities are almost unlimited - in the south there is a connection via the Langen See to the Dahme lake area and the Teupitzer lake chain. The Storkower Canal can be navigated in an easterly direction, which leads further to the lake area around the Scharmutzelsee.