A snowboarder from Suffolk died after becoming trapped in deep snow on a mountain in France, an inquest has heard.
Emily Watts, known as Mimi, was airlifted to hospital in Annecy after the accident at nearby Chamonix on December 8, 2012. She died five days later.
An inquest at Bury St Edmunds heard that Emily had been returning alone down a ski slope when she plunged into deep fresh snow from which it was impossible to get out.
Suffolk Coroner Dr Peter Dean said reports compiled by the French authorities showed that Emily had suffered a cardiac arrest.
The accident was described as a "complete fluke," by a French police officer who said he had never seen a similar one in his 25 years service in the resort.Investigators had been unable to explain what caused the accident but it was clear that Emily had not been off piste.
Recording a verdict of accidental death, Dr Dean said: "This appears to have been a tragic accident. There was no evidence of her behaving in a careless or reckless manner. This was an accident which happened to someone who was an experienced snowboarder."