They are thankful their daughters weren't alone at the end, even as they wish neither was there that night.
A couple of nights this week, Eric has gone down to Ellicott City with Patti and other family members and sat at the two benches dedicated to Liz and Rose. One night a young man, 19, the same age as his daughter, played "Stairway to Heaven" on his guitar in the women's honor as Eric listened to the Tiber tributary trickle past.
"Your free and caring spirit left this earth too soon," reads the bench placard for Rose.
"Live joyously ... Peace," reads the one for Liz.
"It seemed perfect," Eric said of the moment.
There have been more and more of those moments lately.
Beyond the race, which a committee of the young women's friends helped plan, and the benches, which were purchased with the support of the Ellicott City Business Association, scholarships have also been established in both women's names, the parents said.
Fellow dancers from the women's time at Mount Hebron dedicated an alumni performance to them in May. Students and sorority sisters have launched efforts to remember the women at Delaware, where Rose was a nursing major, and at James Madison, where Liz dreamed of becoming a special education teacher.
Sue and Sharon wear lockets that bear the logo of the "2 miles for 2 hearts" race, which was designed by Brendan and includes a rose for Rose, a peace sign for Liz, and three leaves on the rose for Brendan, Anna and Jonathan.
"We probably don't even realize all the people who have done something," said Mark.
For that, the four parents said, they'll always be grateful.