At the age of 16 Trenary moved to Colorado Springs to train at the Broadmoor Skating Club with Carlo Fassi . She celebrated her first success in 1985 when she won the title at the US Junior Championships. In 1987 she was the first US senior champion and that before the reigning world champion Debi Thomas . In the same year she played her first world championship in Cincinnati and finished seventh, while her compatriots Debi Thomas and Caryn Kadavy won silver and bronze. In the 1988 Olympic year she was runner-up behind Thomas at the national championships. In her first and only Olympic Games , she finished fourth in Calgary . At the subsequent World Cup , she was fifth. After the resignation of all three medalists from this year, Katarina Witt , Elizabeth Manley and Debi Thomas, Trenary was now expected to place at the top. As the reigning US champion, she won her first World Cup medal at the 1989 World Cup in Paris with bronze behind Midori Itō and Claudia Leistner . 1990 was her most successful year. For the third time she won the national championships and was also world champion in Halifax, Canada, ahead of Midori Itō and her compatriot Holly Cook . Following this success, she struggled with an ankle injury from which she found difficult to recover. In addition, the compulsory figures were abolished by the ISU , which was its strength. So she announced her resignation in 1991. She switched to the pros and ran for some ice revues like Holiday on Ice until she developed a life-threatening thrombus in her shoulder in 1997 .
On October 15, 1994, Trenary married in Minneapolis the Olympic and multiple world champion in ice dance Christopher Dean . They have two sons together. The marriage was divorced in 2010.