This excerpt is from the WY Government website.Perhaps the name you were given is correct, but not the burial location.
It is as difficult to separate art from the Indian's daily life as it is to separate his religion from his daily life. All are tightly interwoven. There is one Indian reservation in Wyoming, the Wind River Reservation, with headquarters at Fort Washakie. The reservation is the home of some 2,357 Shoshone and 3,501 Arapaho Indians. The total acreage of the reservation is 1,888,334, exclusive of lands owned by the Bureau of Reclamation and other patented lands within the exterior boundaries.