Pattern of injury and illness during expedition-length adventure races.

Objective: To describe injuries and illnesses treated during an expedition-length adventure race and combine the results with those from previous studies to identify common patterns of injury and illness during these events.

Methods: The 2003 Subaru Primal Quest Expedition Length Adventure Race was held in Lake Tahoe, CA, from September 5 to 14, 2003. Eighty teams of 4 individuals participated.