The calculated distance (air line) between Samho-rodongjagu and Wŏnsan is approximately 59 miles respectively 96 kilometers.
By car or train, the actual journey to Wŏnsan is certainly longer, as only the direct route (as the crow flies) between Samho-rodongjagu and Wŏnsan has been calculated here.
Air line (approximately)
96 kilometers
52 nautical miles