 A survey of 679 equestrians in Oregon, Washington and Idaho estimated that at some time in their equestrian career one in five will be seriously injured, resulting in hospitalization, surgery or long-term disability.Among survey respondents, novice equestrians had an incidence of any injury that was threefold over intermediates, fivefold over advanced equestrians, and nearly eightfold over professionals.Approximately 100 hours of experience are required to achieve a substantial decline in the risk of injury.