Grand Ballon means "great [round-topped] mountain" because a ballon in French is a geographical term for a mountain with a rounded summit.

Some still call it Ballon de Guebwiller, after the name of the closest town, Guebwiller, located 8 km (5 mi) to the east.
It is 1,423.7 metres (4,671 ft) high.
Grand Ballon means "great [round-topped] mountain" because a ballon in French is a geographical term for a mountain with a rounded summit. 
Some still call it Ballon de Guebwiller, after the name of the closest town, Guebwiller, located 8 km (5 mi) to the east. It is 1,423.7 metres (4,671 ft) high.
Grand Ballon