It is my purpose in this paper to review and briefly analyze all the reported injuries sustained as a result of skiing at Sun Valley for a three year period ended in May 1942. This is now a pertinent subject in view of the increased interest and participation in skiing. Considering the fact that the United States Army is engaged in the training of ski troops, there is additional practical interest in the type of injury which may be anticipated. Owing to the isolation of Sun Valley, almost all casualties must, from necessity, pass through one of several medical offices. All the medical facilities are under one head, and a single record system is observed.This situation makes for a high degree of statistical accuracy. A full time, paid ski patrol is present at all times on the various slopes. It is the duty of the patrol to observe the