Blackfeet Indian relay horse racing team Carlson Relay won the Championship of Champions September 24, 2023 in Casper, Wyoming. We have results of Championship Sunday and a word with the champ. Fort Pierre, SD – The 10th Annual HNIRC Championship of Champions was held at the Stanley County Fairgrounds Sept. 22-24, 2023. America’s oldest known competition, Indian Relay is exploding onto the western sporting scene as the most exciting extreme sport! The 2023 Championship of Champions may be the largest gathering to ever witness Indian Horse Relay, with the best inter-tribal competition ever assembled.