While the Lemhi Shoshone intermarried with other Shoshone and with Bannock, there was a clear-cut geographical separation between them and the above groups. Some Shoshone wintered in Montana on the other side of the Divide, but they were generally considered to be of the Lemhi band. To the west was the Sawtooth Range and the Tukurika. Although the Tukurika had some contact with the Lemhi people, there were considerable cultural differences between them, owing to the proximity of Plains Indian tribes to the Agaidika and to the different subsistent cycles of the two groups. North of the Lemhi country was the land of the Flathead; to the south the arid Snake River plains intervened between them and the Fort Hall plains population. The Lemhi Shoshone were by no means isolated, but there was considerably less overlapping of activities than in southeastern Idaho. Winter was usually spent in the valley of the Lemhi River in the area between the modern town of Salmon and the old Mormon post of Fort Lemhi. One informant said that the population was distributed in villages of about a dozen buffalo-hide tipis, each village having a leader. During the winter the population subsisted upon dried stores of berries, roots, and the meat of buffalo and other game. The Lemhi Valley was secure from enemy attack in the winter, for the Blackfoot concentrated their attention on the Bannock encampments on the Snake River. Other Shoshone were said to have wintered occasionally on the Beaverhead River in Montana. Steward notes that "possibly a few families lived in the vicinity of Dillon, Montana" (1938, p. 188). He lists a large winter camp of some forty families named "Unauvump," which was situated along Red Rock Creek from Lima, Montana, to Red Rock Lake (ibid.). Steward notes that this name refers to the "locomotive" and thus to the Union Pacific Railroad, which follows the Beaverhead River. We obtained the same name, but our informant thought it was merely a place name and not a camp site. Also the site was a short distance up the Beaverhead River from Dillon, Montana. In any case, the reference to the locomotive established the recency of the name. In view of the Blackfoot incursions in that area it is doubtful whether the camp on Red Rock Creek much pre-dated the treaty. However, Bannock and Shoshone buffalo-hunting parties were frequently forced to spend the winter in Montana, although the exact location of these camps is not known.