Meriwether Lewis and William Clark found many ways to occupy their time during the winter of 1804-05 at Fort Mandan near present day Washburn, North Dakota. They met regularly with the neighboring Mandans and Hidatsas, with whom they traded, provided medical care and shared dances and other gatherings. The men of the Corps of Discovery hunted the surrounding plains and tended to their watercraft. They also endured frostbite.