Tenno (Tén in local dialect) is a comune (municipality) in Trentino in the northern Italian region Trentino-Alto Adige/Südtirol, located about 30 km southwest of Trento. Tenno borders the following municipalities: Comano Terme, Fiavè, Arco, Ledro and Riva del Garda. Its neighborhood of Canale is one of I Borghi più belli d'Italia ("The most beautiful villages of Italy"). Tenno contains the waterfalls of Cascate del Varone. Tenno hosts an yearly summer festival called Quarta d'Agosto (Fourth of August) which is celebrated the fourth Sunday of August, in Cologna.