I followed a walking route called "Kustlinjen" - The Coast Line. Despite the name, long parts of it does not go by the waterline. For a long segment it goes on the top of a ridge in dense forest a couple of hundreds of metres from the sea. I arrived to Lillströmsträsk, a lake which is just a small spot on the map. Such lakes are usually overgrown and unsuitable for swimming, but I was surprised to find the water very fresh. And I had the lake to myself.