The Golfo Corcovado is a large, open bay separating the Isla de Chiloé from the mainland Chilean coast. It is a significant body of open water, reaching up to 50 kilometers in width, and opens directly into the South Pacific Ocean to the south. To the north, it connects to the narrower Canal Chacao, which is approximately 3 kilometers wide and separates Chiloé from the mainland. This geography creates a major marine channel. The region is noted for great tidal amplitudes, meaning paddlers must plan for significant tidal ranges and strong currents, particularly near the Canal Chacao. The gulf's western shore is formed by the eastern coast of Chiloé, which features a narrow coastal plain from Bahía de Ancud southward, though this plain is interrupted by the foothills of the Cordillera de Piuchén. The area contains islands within the gulf, including Isla Acui and Isla Tranqui, the latter being the largest in its island group. The water body is a known habitat for marine mammals, including Chilean dolphins and Peale's dolphins. The open exposure to the South Pacific means paddlers can expect substantial wind fetch and potential for rough conditions, especially in the wider southern sections. The gulf is used by commercial fishing vessels, as indicated by reports of missing fishing boats in the area, signaling the presence of boat traffic that paddlers must be aware of.