Start in the center of the village of St-Luc, next to the church, and take the Chemin de Prosper. Follow the signs directing you to Tignousa. When you arrive at Tignousa, follow the signs directing you to the Cabane Bella-Tola. The Cabane Bella-Tola is a nice stop to eat or simply have a drink with a view of the surrounding summits.
Then, you’ll cross the routes of the Tignousa and Col des Ombrintzes drag lifts. After hiking through the pastures and zig-zagging up the mountainside, you will reach the mountain refuge and the summit ridge; and when you take your eyes off the path, you will see steeply plunging slopes on both sides. The walk continues to the left along the ridge path, towards the Phare de Griolet, on the summit of Rothorn. There is a panoramic 360° view from there of all the peaks. You then retrace your steps to reach the “real” summit of Bella-Tola, from where you have a view of more than thirty peaks that exceed 4000m.