The park is the largest in Italy and covers part of two regions: Trentino-Alto Adige/Südtirol and Lombardia, in 24 municipalities.
Stelvio National Park has borders with the Swiss National Park, the Parco naturale provinciale dell'Adamello-Brenta and the Parco regionale dell'Adamello. Together, these parks comprise 400,000 hectares (1,500 sq mi) of protected natural environment. The park includes an extensive territory of valleys and high mountains, ranging from 650 metres (2,130 ft)[citation needed] to 3,905 m (12,812 ft) in height.