The relations of the Shoshone with the outer world gives some indication of their pattern of movement. They ranged southward to the Spanish settlements, for some of their mules were obtained from the Spaniards and articles of Spanish manufacture were noted (ibid., p. 347). The Shoshone were already suffering from smallpox and venereal disease (ibid., p. 373).
Enemy tribes inflicted losses upon the Shoshone. The "Minetaree of Fort de prairie" had attacked them and stolen horses and tipis (ibid., p. 343), and they had but recently made peace with the Cayuse and Walla Walla (ibid., 5:157-158). The Nez Percé also had frequent clashes with the Shoshone (ibid., pp. 24, 55-56, 113); the territorial situation between the Shoshone and Nez Percé was evidently the same as in later times, for Ca-me-ah-wait stated that the Nez Percé lived on the Salmon River, "below the mountains" (ibid., 2:382). Friendly relations were maintained with the Flathead, who, according to the journals, lived on the Bitterroot River, but fished on the Salmon River (ibid., 3:22).
Later references to the Lemhi River region and adjacent portions of Montana are few. Ferris hunted on the Ruby River in Montana in the early fall of 1831 and mentioned no Shoshone. He did, however, meet a Nez Percé camp of 25 lodges (Ferris, 1940, p. 118). Another Nez Percé camp was encountered after Ferris crossed the Divide to the Lemhi River (ibid., p. 120). Ferris went to the Ruby River again in 1832 and again found no Shoshone. His party was attacked by the Blackfoot and the trappers found refuge in a camp on the Beaverhead River consisting of 150 lodges of "Flatheads, Pen-d'oreilles, and others" (ibid., pp. 177-178). In 1831, Ferris crossed over Deer Lodge Pass to Big Hole River, where he noted that they were on the edge of Blackfoot country (ibid, p. 109). However, he met 100 lodges of Pend Oreilles on Big Hole River who were en route from Salish House to the buffalo country. Ferris then joined the Pend Oreille and some Flathead lodges in a buffalo hunt on the Beaverhead River (ibid., p. 113).
An obvious conclusion from the preceding data is that the Shoshone did hunt in southwestern Montana, but so also did other peoples. The flux of various hunting parties in the area was undoubtedly increased during the fur-trapping period. The extent of their entry into Montana remains undetermined, but their range undoubtedly shifted during the historic period as a direct result of the recession eastward of the buffalo herds. It is uncertain what proportion of the Lemhi population went on the buffalo hunt, and we lack historical information on their winter camps across the Divide. However, casual entry of small parties into southwestern Montana for winter residence would have been most dangerous throughout the historic period because of the continual threat of Blackfoot attacks.