The calculated distance (air line) between San Marcos Yachihuacaltepec and Morelia is approximately 101 miles respectively 163 kilometers.
By car or train, the actual journey to Morelia is certainly longer, as only the direct route (as the crow flies) between San Marcos Yachihuacaltepec and Morelia has been calculated here.
Air line (approximately)
163 kilometers
88 nautical miles