One route would be to sail south along the Pacific coast of North America until reaching the Panama Canal. The Panama Canal is a 48-mile (77 km) ship canal that cuts through the Isthmus of Panama and connects the Atlantic and Pacific oceans. Once through the Panama Canal, ships can then sail north into the Caribbean Sea and then west into the Gulf of Mexico.
Another route would be to sail around Cape Horn, the southernmost point of South America. Cape Horn is a treacherous stretch of water known for its strong winds and high waves, but it is also a popular route for sailing ships. Once around Cape Horn, ships can then sail north into the Atlantic Ocean and then west into the Gulf of Mexico.
Both routes require careful planning and navigation, but they are both possible for sailing ships.