In her first World Cup appearance at the first World Cup in Oslo , Bollerud achieved her only World Cup victory in the sprint. In the next two years she achieved podium placements, especially in the team competition. Her best individual result at world championships she reached at the world championships in France in 1988 with a fifth place. With the team and the relay, she takes second place each at world championships. At the Norwegian Championships , Bollerud was particularly successful with the relay. Bollerud won the relay races in 1989, 1991 and 1992 for the Buskerud region . In addition, she won the individual championships in 1989.