Absarokee is a town rich in the history of the Old West. In 1806, the Lewis and Clark Expedition mapped vast regions of Montana, and today visitors can follow Clark's route through Stillwater County to the only surviving physical evidence of the Lewis and Clark Expedition in Pompey's Pillar National Historic Monument. In the late 1800s, soon after the Crow American Indian tribe ceded the territory as part of the Crow Reservation, homesteads began appearing in Stillwater County. S.T. Simonson, one of the early settlers and primary architect of Absarokee, arrived in 1892 to await the opening to the land. Setting stakes on 160 acres, he built a log hotel and later added a post office. He named his property Absarokee, which he thought meant "our people" in Crow. In 1905, Simonson drew up plans to turn his homestead into a town and commenced selling off lots of land. The little log hotel became Absarokee's first school. Some years later, the Sandstone School was built, and later the Cobblestone High School. Both schools are now listed in the National Register of Historic Places.