Allen played lacrosse, tennis, and basketball at Loyola. She was a standout lacrosse defender, and played a key role on the Loyola squads that compiled a 53-16-1 record and reached national tournaments each of her four years. A team co-captain 1981-82, she earned USWLA All-American honors her senior year. In 1982, Allen was a nominee for the Broderick Award, one of the most prestigious national honors in women's athletics. She continued her lacrosse career after graduation, as a member of the 1982 World Cup Team and the 1984 U.S. Touring Team. She had been a member of the U.S. Lacrosse Team since 1981, when she was just a junior at Loyola.
During her four years at Evergreen, she was one of the school's top tennis players. In singles competition, Allen posted at 7-2 record her sophomore year and a 5-1 mark as a senior. She was also a fine doubles player. In addition, Allen spent two years on the women's basketball team.
At the conclusion of her senior year, Allen received the Ernest Lagna Award as Loyola's top senior student-athlete.