The calculated distance (air line) between Hoeyang and Samho-rodongjagu is approximately 87 miles respectively 140 kilometers.
By car or train, the actual journey to Samho-rodongjagu is certainly longer, as only the direct route (as the crow flies) between Hoeyang and Samho-rodongjagu has been calculated here.
Air line (approximately)
140 kilometers
75 nautical miles