Mont Blanc is not a mountain range. Instead, it is the highest peak of the Mont Blanc msssif, which is a sub-range of the Graian Alps. Mont Blanc is situated on the France-Italy border. The mountain range itself is called the Alps ("les Alpes" in French)
Mont Blanc is on the border of France and Italy. It is also not far from the Swiss border. Mont Blanc is the highest mountain in western Europe at 4810 metres. It is known as Mont Blanc in French, and Monte Bianco in Italian; both of which translate as 'white mountain'.