Punta Bagnà, Mountain summit in Cottian Alps, France and Italy

Punta Bagnà, also called Cime du Grand Vallon, is a 3,129-metre summit of the Scolette chain in the Cottian Alps, on the border between France and Italy. Its upper slopes and ridge are bare dark grey and black rock, from fine scree to large angular blocks, with platy slabs in the lower foreground. The mountain is divided between Modane and Avrieux in France and Bardonecchia in Italy.

The summit lies on the border between France and Italy, shared by the communes of Modane and Avrieux and the Italian comune of Bardonecchia. In its underground, just west of the peak, run the Mont-Cenis railway tunnel, completed in 1871, and the Fréjus road tunnel, opened in 1980.

The French name comes from the Grand Vallon, a side valley that drops north-west towards Charmaix and Modane. The Italian name Punta Bagnà derives from Piedmontese "bagnà" (wet), referring to the fine dark ground near the summit that looks permanently damp. The mountain is also called cime du Grand Vallon on French maps.

Climbers should expect rocky terrain and prepare for difficult conditions, especially when crossing the border zone. The best time to attempt the ascent is between June and September, when conditions are more stable and safer.

The tunnels of Mont-Cenis (completed 1871) and Fréjus (opened 1980) run through the bedrock just west of the summit, so the peak stands above two major Alpine road and rail crossings.