Kärsön is an island connected to Bromma and Lovön by bridge. The main cliff is a classical Stockholm bouldering area very suitable for beginners, consisting of one long wall with over 50 problems, mainly slab and vertical climbs on granite.
Landings are good, most on flat or soft ground.
Heading south west from the main wall there are also secondary zones with slab, wall and a few roof-problems. There are several unmapped lakeside cliffs on the south side but in general the island is bouldering territory. Being a recreational island there are hiking paths around and across the island.
Bring your beach volleyball or maybe frisbees for a frisbee golf round, for shoulder warmup. Also plenty of nice short running trails available. Follow the main running track rightwards from the inner parking to arrive at the main cliff.