A special candlelight vigil was held at sunset at the Victim's Memorial Garden in their honor.
Susie Streeter, her mom Sherrill Levitt, and friend Stacy McCall disappeared after Susie and Stacy's graduation.
The women vanished from Levitt's home on Delmar Street sometime in the early morning hours of June 7th, 1992.
The "Three Missing Women" case made headlines in March 2011 as cable program Investigation Discovery featured the cold case in its show "Disappeared."
"One Missing Link," a nonprofit group founded by McCall's mother Janis, hosted Tuesday's vigil. It's open to the public.
McCall's group is currently helping in the search for the missing Willard couple -- Rebecca and Rusty Porter -- who haven't been seen since mid April.