54th Annual Rocky Boy Powwow Thu 8/02 - Sun 8/05 Rocky Boy Powwow Grounds Scroll to bottom of post for map. Loading Map.... Rocky Boy Powwow GroundsAgency RdSangrey, MT 59521 Need directions? Visit Google Maps. Need lodging? Use Booking.com. Want cash back? Get DO$H. 48.287847888917106 -109.8139154989197 Add a Comment Cancel replyYou must be logged in to post a comment.