The calculated distance (air line) between Piedra Blanca and Bajos de Haina is approximately 35 miles respectively 56 kilometers.
By car or train, the actual journey to Bajos de Haina is certainly longer, as only the direct route (as the crow flies) between Piedra Blanca and Bajos de Haina has been calculated here.
Air line (approximately)
56 kilometers
30 nautical miles