Mont Janus: Driving the Historic Military Road of the Hautes-Alpes
Mont Janus is a high mountain peak at an elevation of 2,529m (8,297ft) above sea level, located in the Hautes-Alpes department of southeastern France. Perched above the town of Briançon, it is famous for its strategic military history and the rugged, high-altitude trail that leads to its summit fortress.
Where is Mont Janus?
The peak is located near the Italian border, dominating the pass between the Col de Montgenèvre and the Col d'Izoard. The road is an old military track designed in the late 19th century to connect the various defensive structures protecting the Briançon valley, which is a UNESCO World Heritage site for its fortifications.
🏰 Mont Janus / Ouvrage du Janus Data
| Elevation | 2,529m (8,297ft) |
| Average Gradient | 13.5% |
| Distance | 5.2 km (from Montgenèvre) |
| History | Maginot Line vs. Fort Chaberton |
How long is the road to Mont Janus?
Starting from Col de Montgenèvre in the Cottian Alps, the road is 5.2km long with an elevation gain of 702m. Over this distance, the average gradient is a punishing 13.5%. The gravel road to the summit is extremely steep and narrow, with dangerous slippery sections and severe drops. Built for army vehicles, the trail is highly exposed, requiring advanced off-road skills and a high-clearance 4x4.
What's at the summit of Mont Janus?
At the summit stands the Ouvrage du Janus. While the first military works date back to the late 19th century (Séré de Rivières system), the last ones date back to the 1930s as part of the Maginot Line. For a few days during WWII, this fort exchanged cannon fire with the Italian fort on Mount Chaberton opposite.
Is the road to Mont Janus open in winter?
The road passes endless old forts, gun placements, and barracks, all situated in an excellent panoramic position. However, keep in mind that access to the ruins is strictly prohibited because they are unsafe and almost all are closed. Due to its extreme altitude, the road is impassable in winter and can be closed at any time due to snow.
Pic: http://www.syme05.fr/fr/documentations/phototheque/montgenevre-alimentation-fort-janus.html