Sarah Marquis

Sarah Marquis (born June 20, 1972) is a Swiss adventurer and explorer. From 2010 to 2013, she walked alone from Siberia to the Gobi Desert, into China, Laos, Thailand, and then across Australia. In 2011, she gave a TED talk of the Télévision suisse romande revealed Sarah Marquis didn't mention this in her book (La voie des Andes).

In April 2024, the fact-checking show Vraiment (Really?) on Radio Télévision Suisse cast doubt her 2018 expedition across Tasmania. After the first revelations of 2010, she had claimed to carry a tracker to prove her walks. She refuses to share her GPS data even to the journalist, adding doubts on the wilderness and off-the-beaten-track status of her trek. It is found she followed marked trails used by recreational hikers. The scientific part of her expedition and collaboration with CSIRO is called into question as her alleged encounter with a Tasmanian tiger, extinct since 1936.