The calculated distance (air line) between Le Gros-Morne and Trois-Rivières is approximately 98 miles respectively 158 kilometers.
By car or train, the actual journey to Trois-Rivières is certainly longer, as only the direct route (as the crow flies) between Le Gros-Morne and Trois-Rivières has been calculated here.
Air line (approximately)
158 kilometers
85 nautical miles