“Big Sky has always been a sacred place,” says Menka Vansant, a horse wrangler at the Old West–flavored Lone Mountain Ranch, homesteaded in 1915 in the Madison Range of the Rocky Mountains, above Yellowstone National Park. For centuries, she explains, the area was used by as many as 49 Indigenous tribes, including Crow, Sioux, and Blackfeet, who rested here en route to the Yellowstone caldera to h...