The only options for visitors to visit Doubtful Sound are boat cruises. The less common way to access Doubtful Sound is by sea. However, there are some boat cruises that operate out of the small town of Manapouri. These day trips first take a boat across Lake Manapouri and then a bus on the gravel road across Wilmot Pass to the Sound, where the Doubtful Sound tour boats berth at a small wharf in Deep Cove. The tour companies offer a day option out of Te Anau/Manapouri or an overnight option.