Paul Arundel, Consultant Paediatric Endocrinologist at Sheffield Children's Hospital, implanted this idea in my head a few months ago. The Brittle Bone Society which has been instrumental in improving the lives of several people with Osteogenesis Imperfecta celebrates its 50th Anniversary next year and we couldn't think of a better way of acknowledging all their work than taking on this challenge. I completed the West Highland Way over 7 days about eleven years ago. So over 4 days, a decade later will be challenging. I am lucky to have some excellent company on the Way. Time to get practising!