No mountain range could be said to do that. France is separated from Spain by the Pyrenees, and from Italy by the Alps and from Switzerland by the Juras. France has borders with other European countries where mountain ranges do not form a barrier, like between France and Belgium.
The five largest European countries by area are... Russia * Kazakhstan * Turkey * France Ukraine The five largest European countries by population are... Russia * Germany Turkey * France United Kingdom * These countries straddle the border between Europe and Asia.
The biggest mountain in France is called the "Mont Blanc" (the White Mount) which tops 4810 metres (15780 feet) in the Alps mountain range. Its summit is also shared by Italy, as it is located on the border between the two countries.