The calculated distance (air line) between Río Grande and Concepción de La Vega is approximately 34 miles respectively 55 kilometers.
By car or train, the actual journey to Concepción de La Vega is certainly longer, as only the direct route (as the crow flies) between Río Grande and Concepción de La Vega has been calculated here.
Air line (approximately)
55 kilometers
30 nautical miles