The lake has a surface area of 128 sq km, and while it is not deep it is full of fish. For a region like Umbria, which has no seaside, this lake is held in high regard. The park includes the lake, its three islands, and the towns along the shore. There are numerous fish species present, including large pike, as well as birds (eagle-owl and osprey). Worthy of note are the Trasimeno icthyogenic centre, Polvese island with its didactic park, Monte Castelluccio park at Tuoro, and wildlife observation by boat.