The Sacro Monte di Orta (literally: "Sacred Mountain of Orta") is a Roman Catholic devotional complex in the comune of Orta San Giulio (Piedmont, northern Italy) on the summit of a hill known as San Nicolao, on the eastern shore of Lake Orta. It is one of the Sacri Monti of Piedmont and Lombardy, included in UNESCO World Heritage list.
It is a stop-over on the CoEur devotional path.
Many of the artworks are of a high quality, some of the most highly thought of painters and sculptors of the period having been commissioned to produce them. The vegetation of the Sacred Mountain runs down to the shores of Lake Orta and was designed in line with ornamental criteria to match the architecture.