The calculated distance (air line) between Bochum-Hordel and Forêt is approximately 90 miles respectively 145 kilometers.
By car or train, the actual journey to Forêt is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Forêt has been calculated here.
Air line (approximately)
145 kilometers
78 nautical miles