The calculated distance (air line) between Bol’shoy Kamen’ and Pokrovka is approximately 68 miles respectively 110 kilometers.
By car or train, the actual journey to Pokrovka is certainly longer, as only the direct route (as the crow flies) between Bol’shoy Kamen’ and Pokrovka has been calculated here.
Air line (approximately)
110 kilometers
59 nautical miles