Ruby was training to become a mountain guide, a process that can take as long as 15 years, and was killed at age 31 on 29 May 2009 after a climbing accident in the Mont Blanc massif. Having climbed the Tour Ronde, she fell into a in the glacier du Geant at around 3,300 m, dragging in two other members of the climbing party she had been leading who had all been roped to each other. One man was killed in the fall, while another sustained serious injuries and was hospitalized after being evacuated by helicopter.