The calculated distance (air line) between Badalona and La Roca del Vallès is approximately 10 miles respectively 16 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 Badalona and La Roca del Vallès has been calculated here.
Air line (approximately)
16 kilometers
9 nautical miles