The Marconi Trail is a scenic roadway in the Canadian province of Nova Scotia. Located in eastern Cape Breton Island, the route is entirely within the Cape Breton Regional Municipality and runs from Louisbourg to Glace Bay along the island's eastern coast. The Glace Bay terminus is at the Marconi National Historic Site, which marks the location of the first radio transmission from North America to Europe, made by Guglielmo Marconi in 1902. The Marconi Trail measures approximately 63 km (39 mi) in length.