The calculated distance (air line) between Beau Vallon and Montagne Blanche is approximately 10 miles respectively 15 kilometers.
By car or train, the actual journey to Montagne Blanche is certainly longer, as only the direct route (as the crow flies) between Beau Vallon and Montagne Blanche has been calculated here.
Air line (approximately)
15 kilometers
8 nautical miles