Tolo Lake History. Tolo Lake is a natural body of water on the Camas Prairie close to Grangeville, Idaho. NPS Image. Nestled among the wheat fields of the Camas Prairie in Idaho is a shallow, natural body of water covering about 36 acres known today as Tolo Lake. While locals often visit this small, quiet pond to fish or watch migratory birds, the lake is best understood as a time capsule with a rich and varied history. Tolo Lake during the Nez Perce Flight of 1877. Tolo Lake History - Nez Perce National Historical Park (U.S. National Park Service)