This document discusses common medical issues that may occur at the Grand Canyon. It notes that the Grand Canyon is one of the seven natural wonders located in Arizona and receives over 4 million visitors annually. Some common medical encounters discussed include electrolyte disturbances, orthopedic injuries, rhabdomyolysis, hypoxia, heat injuries, and acute renal failure. For each condition, symptoms, risks, diagnosis, and treatment approaches are outlined. The document emphasizes the importance of hydration, monitoring electrolytes and urine output, and transferring patients as needed for more advanced care.