The calculated distance (air line) between Barnaul and Gorno-Altaysk is approximately 132 miles respectively 213 kilometers.
By car or train, the actual journey to Gorno-Altaysk is certainly longer, as only the direct route (as the crow flies) between Barnaul and Gorno-Altaysk has been calculated here.
Air line (approximately)
213 kilometers
115 nautical miles