Lake Santa Giustina, created in 1951 with the construction of the impressive Santa Giustina dam, is today one of the most iconic landmarks of the Val di Non. This large artificial lake collects the waters of the Noce River for hydroelectric production and lies in a spectacular landscape where Alpine nature meets bold feats of engineering.
The dam, easily reached from Dermulo along the SS43, rises at the narrowest point of the gorge and immediately strikes visitors with its scale: 152 metres high and capable of holding more than 170 million cubic metres of water, it is one of the most important hydroelectric structures in Trentino. From the bridge beside it, the view opens onto the vast expanse of the lake and the dramatic canyon below. Not far away stands the slender and elegant bridge of the Trento–Malé railway, considered a small masterpiece of modern engineering.
The name of the area recalls the ancient Hermitage of Santa Giustina, hidden at the base of the dam and reachable on foot from Dermulo via a steep but fascinating trail. The ruins of the hermitage, documented since 1537 and inhabited until 1782, are sheltered by a natural rock cavity and preserve an aura of mystery that makes the visit particularly evocative.
Despite its hydroelectric purpose, the lake also offers spaces for relaxation and outdoor activities. On the south‑western shore, accessible via a dirt road at the junction for Coredo, lies a large equipped green area, perfect for walks, picnics and quiet moments surrounded by nature.
On the left shore of the lake rises Cles, the main town of the valley and an important commercial, agricultural and cultural centre. The town preserves historical treasures of great value, such as the famous Tavola Clesiana, a Roman edict from 46 AD displayed in reproduction in the square in front of the Palazzo Assessorile. This building, once owned by the noble Cles family, is documented from the 14th century and was rebuilt in 1543, later becoming the seat of the representative of the Val di Non and Val di Sole under the prince‑bishopric.
Cles reached its greatest splendour thanks to its most illustrious citizen, Prince‑Bishop Bernardo Clesio, who played a decisive role in the town’s urban and cultural development, leaving a lasting mark on the monumental Church of the Assumption, an elegant blend of Gothic and Renaissance styles. Completing the scene is the imposing Castel Cles, which dominates the lake from an isolated hill and reflects its silhouette in the calm waters below.
