The calculated distance (air line) between Gourbeyre and Anse-Bertrand is approximately 35 miles respectively 57 kilometers.
By car or train, the actual journey to Anse-Bertrand is certainly longer, as only the direct route (as the crow flies) between Gourbeyre and Anse-Bertrand has been calculated here.
Air line (approximately)
57 kilometers
31 nautical miles