Tyresö Båtklubb & Trollbäckens Båtsällskap

This harbour belongs to Trollbäckens Båtsällskap, a non-profit, member-run boat club in Tyresö Municipality outside Stockholm. The club operates two facilities: one at Storängen with a harbour and berths for about 60 boats plus winter storage for about 340 boats, and a larger facility at Ängsudden in Vissvass with space for about 300 boats.

This is a members-only club where operations rely on all members taking turns with night-watch duty, work obligations, and participation in launching and hauling out boats.

At Storängen there is a clubhouse, a mast shed, a machine garage and storage sheds, while Vissvass has a caretaker's cottage with a workshop, cellar storage, a large barn for social events, and a wood-fired sauna by one of the piers. Electricity posts and lake water are available throughout the area, with power outlets at every pier and well water at the shore end of one of the piers in Vissvass.