The Greifensee close to Zurich is anice lake which on a nice trip can rounded by skates, bicycles or on foot (about 20 km) In fall every year the Greifenseelauf is taking place here. This halfmarathon (10km can be done as well) is one of the oldest and biggest annual running events in Switzerland. One should also mention the Climbing centre (Milandia) in Schwerzenbach which was opened in 2007. Next to the climbing centre other sport activities like tenis and golf can be performed as well.