The main attractions of this remote village include the lake Felixer Weiher (1605 meters above sea level).
Until the 19th century, St. Felix was called Caseid (from Italian casetta, meaning small house, little settlement).
Today's name derives from the small church in the town that was built in honor of Saint Felix of Nola.
St. Felix became an independent municipality when it split from Unsere Liebe Frau im Walde in 1864.
In 1919, the Treaty of Saint-Germain-en-Laye sanctioned the annexation of the southern parts of Tyrol, including St. Felix, by Italy.
The two neighboring municipalities of St. Felix and Unsere Liebe Frau im Walde were merged in 1974.