On December 25, 1804, the members of the Lewis and Clark Expedition celebrated Christmas at Fort Mandan, their winter encampment in present-day North Dakota. The day began with the men waking the captains by firing their guns and a cannon, a festive if somewhat boisterous tradition.

The celebration included special food, rum, and dancing, providing a much-needed respite from the arduous journey and the harsh winter conditions. This Christmas marked a significant moment for the expedition, as it was their first spent in the vast, unmapped territories of the American West.

While Fort Mandan itself is not in Montana, the expedition's presence there was a crucial part of their journey through what would become Montana, and their observations and interactions with Native American tribes during this winter laid important groundwork for their continued exploration of the region. The celebration underscores the human element of this epic journey, highlighting the resilience and camaraderie of the Corps of Discovery.