A 5k walk and run held Saturday raised money for the McKenzie Wilson Foundation, a charity started by the family of a 15-year-old girl who died in 2010.
McKenzie Wilson was a student at the Bolles school. She suffered a seizure in August.
Initial reports said that the girl died from meningitis, but the family said doctors haven't been able to pinpoint what caused her death.
"The doctors still, we still haven't gotten an official word," said Blake Wilson, 16, her brother. "We won't get an official word. It's just one of those things where we have to take it, we have to move on."
Saturday morning, the family organized their second run and walk at EverBank Field to raise money for the foundation.
The foundation guides and mentors Jacksonville children.
Last year's run raised $150,000 for the McKenzie's Academic Resource Center, which offers after-school programs to elementary, middle and high school students.
The money also went towards an orphanage in Uganda named after McKenzie.
"Our foundation focuses on these kids, getting them to where McKenzie was. Her spirit, her liveliness, her caring, caring for others," said Wilson.
McKenzie's brother Blake is a student at Sandalwood High. He tutors at the resource center.
"We help kids with their homework, we read to them and try to get their academic skills higher than what it is," said Andre Bass, a volunteer at McKenzie's Academic Resource Center.
"I can't even tell you what it's like to drive down the street and to see McKenzie's bands or to see the crosses or to see the shirts and to see how her legacy has continued to grow," said Wilson.
"It's still growing," he added.
About 3,000 people turned out Saturday for the walk.