Kalnai Park (Lithuanian: Kalnų parkas, literally: Park of Hills) is a 24.5-hectare (61-acre) park between the left bank of the Neris River and right bank of the Vilnia River in Vilnius, Lithuania. It lies within the Vilnius Old Town elderate near Gediminas Hill and Gediminas Tower, and is part of the State Cultural Reserve of Vilnius Castles, established in 1997. The park hosts various events, including concerts, political rallies, and sporting competitions.