Rocky Mountains

The era of organized wagon-train migration from the Missouri River frontier to Oregon and other western destinations, especially prominent from the 1840s through the 1860s.

The Missouri River commercial and outfitting area, including Westport Landing and nearby Independence, that served as a principal departure zone for emigrant wagon trains.

The Pacific Northwest destination sought by many 19th-century overland emigrants traveling the Oregon Trail.

The broad grassland region traversed by emigrant wagon trains west of the Missouri River.