Halverson made her senior debut at the 2008 Midwestern Sectional Championships, where she won the pewter medal. At the 2008 U.S. Figure Skating Championships, her second senior-level competition, she was the youngest senior in the men's division to compete. Because these championships were held in her hometown of St. Paul, Halverson became a poster-child for the 2008 Nationals. She placed 13th overall and was named first alternate for the 2008 World Junior Figure Skating Championships.