The calculated distance (air line) between Balaruc-les-Bains and Grenoble is approximately 157 miles respectively 252 kilometers.
By car or train, the actual journey to Grenoble is certainly longer, as only the direct route (as the crow flies) between Balaruc-les-Bains and Grenoble has been calculated here.
Air line (approximately)
252 kilometers
136 nautical miles