From the Cimirlo pass, climb up to Fort Roncogno, following path 419. Continuing on the path that climbs up to Mount Celva, it takes a few minutes to reach the diversions to visit the Sentiero dei 100 scalini (100 steps path). Returning to path 419, one arrives at the lower area of the Celva, known as the Ex Observatory, where it is possible to walk along the long trench that surrounded the area and enter the cave works. The path to the summit of the Celva continues among what remains of the defence system. At the summit, the pit where the armoured dome stood is visible. Descending in a westerly direction below the summit, near the large repeater, it is possible to access the cave emplacements. The return is along the ascent route.

Sector III of the Fortress covered the northern area of the Marzola, the Cimirlo pass and Mount Celva.

Find out more about the sectors of the defensive system of the "Fortress of Trento", dating back to the Great War.

Discover all the trekking routes of the Great War in Trento and surroundings.