More than 11 million children attend more than 12,000 summer camps in the United States each year. The challenges to keeping children and the staff healthy and safe can be daunting. To better understand the types of illnesses and injuries common to the camp environment, the American Camp Association (ACA) has undertaken a 5-year study to document these occurrences. The purpose of this study is to monitor illness and injury among campers and staff at U.S. summer camps and identify risk and protective factors associated with such adverse events. The research questions addressed are: (a) What are the benchmarks for accident and illness rates for campers and staff at summer camp? (b) Are there any differences based on camp demographics? (Contains 1 table.)