The calculated distance (air line) between Thaba-Tseka and Mohale's Hoek is approximately 81 miles respectively 130 kilometers.
By car or train, the actual journey to Mohale's Hoek is certainly longer, as only the direct route (as the crow flies) between Thaba-Tseka and Mohale's Hoek has been calculated here.
Air line (approximately)
130 kilometers
70 nautical miles