The Marathon des Sables has been listed by Outside Magazine as one of the 9 toughest ultramarathons in the world.
In 2015, she participated in six races, winning all and setting new course records in four.
Barnes grew up in Sweden but moved to England in 2007 where she started to run ultra trails in 2011.
She holds an MSc in Engineering & Business Management and a Graduate Certificate in Change Management, and has a professional background in management consulting.
Barnes co-owns a shop that specializes in running equipment.
Her partner, Norwegian Sondre Amdahl, is a professional mountain ultra trail-runner and endurance coach.