The boat and paddle were made by the Crowsheart Mandan at Fort Berthold, North Dakota in the early 1900s. This boat is made from a large cowhide, though traditional boats were made from buffalo. The bull boat has a bent-pole framework covered by the hide, which makes it waterproof. Circular boats are rarely found in North America and were only used for crossing rivers and streams, not for long journeys. This boat is 5.5 feet in diameter with sides 1.5 feet high and could carry up to five people.