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The Duncan Grant Ranch and its surrounding landscape are representative of ranching in the early era of Wyoming history. Duncan Grant immigrated to the United States from Scotland and homesteaded along the Sybille Creek in 1874. The family established the ranch in a typical manner, expending most time and energy on the ranch operations and less time of the house. They constructed a small two room cabin, irrigated the land via the Two Bar Ditch and built the barn and corrals. The Grant family ran approximately 400 head of cattle during this time. Duncan Grant also served as a foreman for the extensive Swan Land and Cattle Company. With this increased income the family undertook an extensive building project ca. 1890. This included a new house, ice house, bunkhouse, and an expansion of the barn.