The Kettle Falls Archaeological District, spanning the Columbia River between Ferry and Stevens counties, Washington, represents one of the most culturally and historically significant Indigenous sites in the Pacific Northwest. For over 9,000 years, the roaring cascades of Kettle Falls served as a vital ecological and cultural epicenter for the Salish-speaking peoples of the Columbia Plateau, particularly the Colville, Spokane, Kalispel, and Sanpoil tribes. As the second-largest salmon fishery on the Columbia River, the falls attracted thousands of Native Americans annually during the seasonal salmon runs. This massive convergence transformed the area into a major hub for intertribal trade, diplomatic councils, social games, and spiritual ceremonies. Although the physical falls and surrounding encampments were inundated in 1940 by the reservoir of the Grand Coulee Dam (Lake Roosevelt), the district remains a sacred ancestral landscape of immense cultural importance.

In the early 19th century, the existing Indigenous trade networks at Kettle Falls naturally drew Euro-American explorers, fur traders, and missionaries to the area. Canadian explorer David Thompson arrived in 1811, and by 1825, the Hudson's Bay Company had established Fort Colvile nearby, which quickly became the most profitable inland fur-trading post in the Columbia Department. This was followed by the establishment of St. Paul's Mission in 1845 to minister to the tribes gathering at the fishery. Extensive archaeological excavations, conducted primarily before the reservoir was filled and during subsequent seasonal drawdowns, have yielded rich assemblages of projectile points, fishing gear, and trade goods. These resources have provided researchers with invaluable insights into the technological adaptations, trade patterns, and enduring cultural resilience of the region's inhabitants over millennia.

Established in 1845 by the renowned Jesuit missionary Father Pierre-Jean De Smet, St. Paul's Mission represents one of the earliest and most significant outposts of Euro-American influence and Christian missionary activity in the Pacific Northwest. Located on a high bluff overlooking the historic Kettle Falls on the Columbia River in Ferry County, Washington, the mission served as a vital spiritual and cultural crossroads. The surviving hand-hewn log church, constructed in 1847 under the direction of Father Joseph Joset and built by local Native Americans using traditional mortise-and-tenon joints without nails, stands as one of the oldest remaining pioneer-era structures in the state. The mission was strategically positioned to minister to the Colville, Lakes (Sinixt), and other regional tribes who gathered at Kettle Falls-a premier traditional indigenous fishing site-for the annual salmon runs, thereby playing a pivotal role in the early contact, trade, and conversion efforts in the Inland Northwest.

The historical significance of St. Paul's Mission is further amplified by its close proximity to the Hudson's Bay Company's Fort Colvile, which facilitated a unique intersection of the regional fur trade, Catholic liturgy, and Native diplomacy. The mission operated as an active religious and educational center until the late 1870s when the Jesuit fathers relocated their operations. Following decades of deterioration, the historic chapel was meticulously restored in the late 1930s, just before the construction of the Grand Coulee Dam inundated Kettle Falls and forever altered the surrounding landscape. Today, preserved within the Lake Roosevelt National Recreation Area, St. Paul's Mission serves as a poignant physical monument to the complex, often turbulent interactions between Native populations, European traders, and Catholic missionaries during the mid-19th century.