At the opening triathlon of the season 2011 in Nice (24 April 2011), Nivon placed 31st and was not among the three triathlètes classants l'équipe, all of whom were foreign elite stars (Melanie Annaheim, Ricarda Lisk, and Céline Schärer).
Ruth Nivon Machoud lives in Mexico (Oaxaca) and in Switzerland (Fully, Valais).
Her mother, Dr. Corinne Machoud, is a Spanish teacher and triathlon coach, her father, Dr. Sergio Nivón, is a doctor, together they own the San Felipe Academy in Oaxaca.
[3] In 2009, Ruth Nivon Machoud won a law case against the Mexican Triathlon federation which disallowed her to take part in the Olimpiada Nacional because Ruth Nivon had declared to represent Switzerland in ITU events from 31 March 2009 onwards.
[4] In the five years from 2006 to 2010, Ruth Nivon Machoud took part in 12 ITU events and achieved five top ten positions.