The calculated distance (air line) between Mexicali and Casa de Oro-Mount Helix is approximately 89 miles respectively 143 kilometers.
By car or train, the actual journey to Casa de Oro-Mount Helix is certainly longer, as only the direct route (as the crow flies) between Mexicali and Casa de Oro-Mount Helix has been calculated here.
Air line (approximately)
143 kilometers
77 nautical miles