The calculated distance (air line) between Mazār-e Sharīf and Boysun is approximately 104 miles respectively 167 kilometers.
By car or train, the actual journey to Boysun is certainly longer, as only the direct route (as the crow flies) between Mazār-e Sharīf and Boysun has been calculated here.
Air line (approximately)
167 kilometers
90 nautical miles