To reach the car park where the walk starts from Fonte Cerreto, head towards Castel del Monte via the SS17bis road; after 17 km, turn left onto the SR17bis/C road and continue to Campo Imperatore, 10 km away.
(S/E) From the car park, head north-west along a well-marked path signposted with white and red rectangles. Pass above the astronomical observatory and arrive at a junction.
(1) Ignore path no. 101, which branches off to the right, and follow path no. 100D, climbing up a series of hairpin bends until you reach the Duca degli Abruzzi mountain hut.
(2) Leave the refuge on your left and head north-east, following the ridge along a small, unmarked path to the summit of Picco Confalonieri.
(3) Descend to a pass, then follow the ridge towards the next summit. Descend to the Sella di Monte Aquila pass.
(4) At the signpost for Corno Grande Vetta Occidentale, follow the marked route no. 103 for approximately 150 m. Turn left at the signposts, staying on route no. 103. Walk along the mountainside heading north, leaving the path leading to the Garibaldi Refuge on your left, and follow the path heading west through a large scree slope (or snowfield, depending on the season) until you reach a ridge.
(5) Climb northwards and then, when the track turns eastwards, look out for large white dots circled in red – which replace the rectangular markings – and follow them. Walk almost level along the ridge until you reach the start of a steep slope.
(6) From this point, follow the white and red markings that indicate the route (Via delle Creste) very closely, to the nearest metre. Go to the right or left of the ridge line as indicated by these two-coloured round markers, using your hands to help you climb the rocks. Use a metal bar fixed into the rock at a more tricky section. Cross any remaining snowfields. Continue to the summit, marked by a cross.
(7) Then descend back down the same route you took on the ascent to the Sella di Monte Aquila.
(4) At the signpost for Campo Imperatore, follow path no. 101: leave the ridge and head down a steep slope. Further down, continue along the mountainside to the next junction, which you have already passed on the way up.
(1) Continue down the path, following the route in the opposite direction to the ascent, to return to the car park (S/E).