The calculated distance (air line) between Īstgāh-e Rāh Āhan-e Garmsār and Semnan is approximately 65 miles respectively 105 kilometers.
By car or train, the actual journey to Semnan is certainly longer, as only the direct route (as the crow flies) between Īstgāh-e Rāh Āhan-e Garmsār and Semnan has been calculated here.
Air line (approximately)
105 kilometers
57 nautical miles