Fort de Roche la Croix
Fort de Roche la Croix is a high mountain military fortress at an elevation of 1.906m (6,253ft) above the sea level, located in the Alpes-de-Haute-Provence department in southeastern France.
The road to the summit, located within the Mercantour National Park, is gravel, rocky, tippy and bumpy at times. The road is usually impassable in winters. Great trail for experienced wheelers. Avoid driving in this area if unpaved mountain roads aren't your strong point. The fort was built between 1884 and 1889.
4x4 required. Stay away if you're scared of heights. Expect a trail pretty steep. Starting from Meyronnes (D900 road), the ascent is 5.7km long. Over this distance the elevation gain is 375 meters. The average gradient is 6.57%. Wet conditions may make for tough driving along the muddy road.