The French-Canadian reached third place in the 1986/87 season on December 6, 1986 in the giant slalom in Waterville Valley (New Hampshire, USA). On March 22, 1986 she reached the 5th place in the Bromont Giant Slalom in Quebec (Canada). On March 9, 1986, she finished sixth in the giant slalom in Sunshine Village (Alberta, Canada). Later she was unable to even come close to confirming this result. At the 1988 Olympic Games in Calgary , she was eleventh in giant slalom. During her career, Lacasse won seven Canadian championship titles (giant slalom 1981, 1986, 1987 and 1990; slalom 1986, 1988 and 1990).