Topographical map of the road from Missouri to Oregon : commencing at the mouth of the Kansas in the Missouri River and ending at the mouth of the Wallah Wallah in the Columbia [Sheet 6].

Map shows the route taken by Frémont in 1842-1844 on his trip from Westport on the Missouri River to Oregon; areas of Native American habitation, locations of Frémont's camps, vegetation, water supply, and landmarks. Includes remarks, meterological observations, and extracts from Frémont's report. Relief shown by hachures. Scale not noted