File:The Guayas (Tall Ship) Leaves Dublin - Sunday 26th. August (7864783324).jpg

The Guayas is a sail training ship of the Ecuadoran Navy. Launched in 1976 it was named in jointly in honor of Chief Guayas, the Guayas river, and Guayas, the first steamship that was constructed in South America in 1841 and is displayed on the Ecuadorian coat of arms. The ship's home base is Guayaquil, Ecuador.

The Guayas is a three-masted barque with a steel hull that can display a sailing area of 1,410 square metres (15,200 sq ft). The main mast reaches 38 metres (124 ft 8 in) over deck. The ship carries a crew of about 120 sailors as well as eighty cadets under the leadership of about 35 officers. The Guayas is one of four sailing ships that were built by Astilleros Celaya S.A. in Bilbao, the Gloria (Colombia) being the most similar ship, - the other two sister ships are the Simón Bolívar (Venezuela), and the Cuauhtémoc (Mexico). These four ships present a basic design that is very similar to Blohm & Voss' Gorch Fock that was built more than four decades earlier.

As an ambassador of its country, the Guayas is a participant in tall ship regattas.The most recent participation was in the Tall Ships' Race 2007 Mediterranea. In 2002 the Guayas undertook a voyage along the West coast of North America with port of calls at Acapulco, San Diego, Los Angeles, San Francisco, and Seattle. In 2008 the Guayas crossed the Pacific ocean to visit Vladivostok, Japan, Korea, and China. On the Osaka-Pusan-Shanghai leg of this her first Asian trip the Guayas took aboard an officer of the Chinese navy for reefing training. Over her lifetime, by the end of 2008 the Guayas had visited 60 harbours in 25 countries and covered about 340,000 nautical miles (630,000 km).

The "Guayas" has also participated in OpSail 2012, visiting New York, Norfolk, Baltimore, and Boston, before proceeding to Europe.