Route of the 1539 voyage by Francisco de Ulloa from Navidad (Acapulco) along west coast of Mexico

Francisco de Ulloa (d. 1540) was a Spanish explorer who explored the west coast of present-day Mexico under the commission of Hernán Cortés. The reports of his expeditions along the Baja California peninsula are credited with being influential in the perpetuation of the 17th century cartographic misconception of the existence of the Island of California.

It is not known whether Ulloa accompanied Cortés on his first expedition to the New Spain. By the account of Diaz del Castillo , he came to Mexico later while transporting letters to Cortés from his wife. According to some early historians, Ulloa was influential in helping subdue the Aztec capital by naval power.

In 1539, at the private expense of Cortés, he embarked on an expedition in three small vessels, sailing north from Acapulco to explore the Pacific Coast, and to seek the mythical Strait of Anián that supposedly led to the Gulf of St. Lawrence, proving the existence of the Northwest Passage. The expedition left on July 8 sailing along the coast of Mexico and reaching the Gulf of California six weeks later. Ulloa named it the "Sea of Cortés" in honor of his patron. When one of his ships was lost in a storm Ulloa paused to repair the other two ships, and then resumed his voyage on September 12, eventually reaching the head of the Gulf of California.

Unable to find the Strait of Anián, Ulloa turned south and sailed along the eastern coast of the Baja California peninsula, landing at the Bay of La Paz . After taking on supplies of wood and water Ulloa rounded the tip of the peninsula with great difficulty and sailed northward along the western shore in the Pacific Ocean.

The progress of his small ships was hampered by the fierce winds and high seas he encountered, eventually forcing him to turn back to New Spain. The voyage eventually reached 28 degrees north near the Isla de Cedros .

Although his discoveries lent support to the fact that Baja California was a peninsula, his reports were used to create maps depicting California as an island. According to Diaz del Castillo, Ulloa was stabbed to death after his return by a sailor in 1540. By other accounts, his ship was lost without a trace during the return voyage from Baja California.

See also

• Fortún Ximénez
• Hernando de Alarcón
• Juan Rodriguez Cabrillo

External link

• Catholic Encyclopedia Fransicso de Ulloa
• AmericanJourneys.org Francisco de Ulloa