Tenno is a comune in Trentino in the northern Italian region Trentino-Alto Adige/Südtirol, located about 30 kilometres 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. Tenno contains the waterfalls of Cascate del Varone. Tenno hosts an yearly summer festival called Quarta d'Agosto which is celebrated the fourth Sunday of August, in Cologna.