The calculated distance (air line) between Bandar-e Anzalī and Rūdsar is approximately 51 miles respectively 83 kilometers.
By car or train, the actual journey to Rūdsar is certainly longer, as only the direct route (as the crow flies) between Bandar-e Anzalī and Rūdsar has been calculated here.
Air line (approximately)
83 kilometers
45 nautical miles