Colle San Carlo to Lago di Pietra Rossa Trail

The hike from San Carlo Pass to Lago di Pietra Rossa typically takes about 2 hours and 45 minutes for the ascent. The return descent is quicker, usually around 1 hour and 30 minutes. The total duration for the full tour, including breaks, is approximately 7 hours and 37 minutes.

The trail is generally recommended for hiking from July to September. During this period, conditions are most favorable, minimizing the risk of snow and ice, especially in the higher, more challenging sections.

The terrain varies significantly. The initial section from Colle San Carlo to Lago d'Arpy is an easy, wide dirt road through a shaded forest. Beyond Lago d'Arpy, it becomes challenging, with rocky and scree sections, steep ascents, and notable rock steps. The path can be wet and slippery, and around Lago di Pietra Rossa, the ground can be chaotic and unstable with scree and moraine.

The trail officially starts from Colle San Carlo. There is parking available at the trailhead, making it convenient for hikers arriving by car. Look for the designated Trailhead area.

Yes, dogs are generally allowed on this trail. However, due to the challenging and rocky terrain, especially beyond Lago d'Arpy, ensure your dog is accustomed to such conditions and always keep them on a leash for their safety and to protect local wildlife.

No, there are no specific permits or entrance fees required to hike this trail. It is freely accessible to the public.

Highlights include the serene Lake Arpy with its Mont Blanc reflections, the historic Fortino del 1600 Baraccone Saint-Maurice near the start, and the stunning dark blue glacial Lago di Pietra Rossa itself. You'll also encounter a beautiful Lake and Casata Waterfall and enjoy panoramic Valley Views of the Mont Blanc range.

The initial section from Colle San Carlo to Lago d'Arpy is considered easy and suitable for families and beginners. However, beyond Lago d'Arpy, the trail becomes significantly more challenging, with steep, rocky, and potentially slippery sections, making the full route unsuitable for beginners or young children.

The trail offers magnificent landscapes. You'll walk through beautiful forests of firs and larches, enjoy reflections of the Mont Blanc massif at Lago d'Arpy, and as you ascend, breathtaking panoramic vistas of the Mont Blanc range, including the Grandes Jorasses and Dent du Géant, become increasingly prominent. Lago di Pietra Rossa itself is a striking glacial lake surrounded by mountains and snowfields.

Yes, the route also passes through sections of the Sentiero Colle della Croce and the Sentiero Alpinistico Monte Colmet.

Given the trail's difficulty and varied terrain, it's essential to pack sturdy hiking boots with good ankle support, layers of clothing suitable for changing mountain weather, rain gear, plenty of water, snacks, a map or GPS device, and sun protection. Trekking poles are highly recommended for the steep and rocky sections.