In February 1952, Klopfer competed at the Winter Olympics in Oslo, Norway and finished fourth at the event. Her final competition was the 1952 World Championships in Paris, France. She won silver behind du Bief and then retired from competition.
From the early 1960s, Klopfer coached with her husband in New York City at the Sky Rink.[4] When the rink closed around 1983, they moved to the Gloucester Skating Club in Orleans, Ontario.[5] Her students included Dorothy Hamill, Elizabeth Manley,[4]Scott Smith, and Charlene Wong (from 1986 to 1990).[6] She was inducted into the Skate Canada Hall of Fame in 2001[7] and into the Professional Skaters Association' Coaches Hall of Fame in 2005.[8]