Belledonne is a mountain range in the Dauphiné Alps in southeast France. The southern end of the range forms the eastern wall of the mountains that surround the city of Grenoble.
The range is noted for the spectacular scenery it provides the inhabitants of Grenoble, numerous ski areas, interesting geology, and a diverse range of alpine land types and uses.
Wikipedia https://en.wikipedia.org/wiki/Belledonne
Coordinates 45°18'11.55" N 6°2'24.275" E