Monte Gran Costa: A historic military peak along the Assietta Road
Monte Gran Costa is a high mountain peak reaching an elevation of 2,615m (8,579ft) above sea level, located in the Cottian Alps of northern Italy. It is one of the most significant historical points along the famous Assietta ridge, offering panoramic views and a deep dive into the military past of the region. It's one of the highest roads in the country.
| Road facts: Monte Gran Costa | |
|---|---|
| Location | Piedmont, Italy (Gran Bosco di Salbertrand Park) |
| Elevation | 2,615 m (8,579 ft) |
| Access Road | Strada dell'Assietta (SP173) |
| Site Category | Military Ruins / Scenic Viewpoint |
| Surface | Unpaved / Gravel |
How to reach the summit of Monte Gran Costa?
Access to Monte Gran Costa is exclusively via the Strada dell'Assietta (SP173). The peak is situated between Colle d'Assietta and Colle Lauson. A short, unpaved military track branches off from the main ridge road to reach the summit plateau where the historical ruins are located. For full details on the access route, schedules, and restrictions, see our complete guide to the Assietta Road.
What is the military history of Monte Gran Costa?
The summit of Monte Gran Costa was a strategic site during the late 19th century. It houses the remains of the Batteria del Gran Costa, a military fortification built to defend the ridge. Visitors can still explore the ruins of the large barracks (Casermaggio) which could once house hundreds of soldiers. These stone structures, though roofless, stand as a testament to the intense military engineering of the 1880s.
What are the views like from Monte Gran Costa?
At 2,615 meters, Monte Gran Costa offers one of the best 360-degree viewpoints in the Gran Bosco di Salbertrand Park. From the summit, you can see the Susa Valley to the north and the Chisone Valley to the south. The flat plateau of the summit is an ideal spot for a break while driving the ridge, providing a clear perspective of the winding military road you have traveled.
What are the driving conditions to Monte Gran Costa?
The track to the summit is a high-altitude gravel road, often rocky and narrow. It requires a vehicle with high ground clearance. Like the rest of the Assietta area, it is only accessible during the summer months. Drivers should be prepared for thin air and sudden weather changes, which can make the unpaved surface slippery and challenging.