The calculated distance (air line) between Obligado and Mariano Roque Alonso is approximately 174 miles respectively 280 kilometers.
By car or train, the actual journey to Mariano Roque Alonso is certainly longer, as only the direct route (as the crow flies) between Obligado and Mariano Roque Alonso has been calculated here.
Air line (approximately)
280 kilometers
151 nautical miles