That mountain range is the Alps.
Monte Bianco
That would be quite a range. But if you mean Italy, France and Switzerland, then it's the Alps.
Matterhorn (German) mountain is a part of the Pennine Alps. The mountain is located between the borders of Switzerland and Italy.
Apennies
The backbone of Italy is made of mountain ranges. The mountain ranges are called the Italian Appennino or the Apennine Range or just the Apennines.
Colorado borders the mountain region.
Matterhorn (German) mountain is a part of the Pennine Alps. The mountain is located between the borders of Switzerland and Italy.
No country borders Italy to the south.
Switzerland is the country that has the most of the Alps mountain range within its borders, with about 60% of the total area of the Alps falling within Switzerland.
The Appenines mountain range runs through most of the Italian Peninsula.
The countries whose borders are defined by the Alps are Austria, France, Italy, Slovenia, Switzerland, Liechtenstein, and Germany. The mountain range forms a natural boundary between these countries, with its peaks and valleys shaping their borders.