The calculated distance (air line) between Granollers and La Roca del Vallès is approximately 3 miles respectively 5 kilometers.
By car or train, the actual journey to La Roca del Vallès is certainly longer, as only the direct route (as the crow flies) between Granollers and La Roca del Vallès has been calculated here.
Air line (approximately)
5 kilometers
3 nautical miles