Armiger played for both field hockey and lacrosse teams throughout her athletic career as a Heron. For lacrosse, she earned IWLCA third team All-America honors as a junior in 1999. She started all 17 games that year and notched 36 goals and 12 assists for 48 points. Armiger added 10 caused turnovers, 26 ground balls and 14 draw controls. She finished her Heron lacrosse career with 77 goals and 50 assists for 127 points and 57 ground balls.