The Americas Rugby Championship, often informally called the Americas' Six Nations, was an annual international rugby tournament between six North and South American nations: Argentina, Brazil, Canada, Chile, the United States and Uruguay.

In 2015, it was announced that from 2016, the competition would reform under the guidance of the Americas Rugby Association and the respective unions, to provide the six national sides with additional rankings tests annually.

The updated format was based on the structure of the European Six Nations Championship, coinciding with each other in February and March of each year.

[2] Prior to this, the last competitive tournament to be held across the Sudamérica–RAN region had been the PARA Pan American Championship, which had ceased after its 2003 edition.

[3] Originally formed in 2009 by World Rugby (then known as the International Rugby Board) to replace the North America 4 Series, was created to give the newly formed Canadian regions more competitive matches against strong opposition from the second teams of the United States and Argentina.

The inaugural competition took place at the Estadio Cincuentenario in Medellín, Colombia from August 24 to September 1.