Pedunculate Oak (Quercus robur) stood in Trainiškis village, which is located on the shore of Baluošas lake. Trunk girth - 6.1 m. Height - 23 m. Age - approximately 700-800 years. Unfortunately, it got knocked down during a storm on the 5th of October, 2016. It was the oldest tree in the territory of the park. In the spring of 2017 a young oak tree was planted beside the old Trainiškis Oak stump.