Kolsnaren and Viren are lakes in Södermanland, Katrineholm and Vingåker municipalities that are part of the Nyköpingsån water system. Kolsnaren is 12 km² and at its deepest 12 m and flows via Viren to Nyköpingsån.
The lakes contain perch, pike, zander, eel, roach and planted rainbow trout. Zander and rainbow trout have been continuously planted by the association in recent years.
Interest in sport fishing in the lakes has increased and we are selling more and more fishing licenses. This has meant that we have been able to manage quite a few fishery conservation measures. Planting of zander has taken place almost every year, and on some occasions we have also stocked rainbow trout.
There is also a marina in the lakes.
