PHILADELPHIA (CBS) — Hundreds stepped out Sunday morning for the National Brain Tumor Society‘s Race for Hope Philadelphia walk and run.

The run started at Eakins Oval and looped through Fairmount Park and Martin Luther King Jr. Drive.

Under a cloudy sky, family and friends paid tribute to those lost to brain tumors, and honored those who have fought, like survivor Chad Szapor, who was diagnosed seven years ago, at age 17.

“It feels great,” Szapor said. “when you see and show how much love people have for you when they show up for things like this.”

The event raises awareness and much-needed resources to fund critical brain tumor-specific programs to improve the lives of all those affected by brain tumors.

Diane came out for her son, Rusty, who was recently diagnosed.

“He was just diagnosed in September,” she said, “and had his surgery in September. He’s doing great and he raced today.”

Bernadette Powers honored her father, Jim Carrey, who lost his 18-month fight in April to brain cancer.

“It was very unexpected,” Powers said. “He was working, he was active, a very healthy person.”

Carrey was a CEO for a local insurance company. His colleagues raised $33,000 for the cause, and Powers said it was a day that would make her dad proud.

“Building this team is just something he would have done,” she said. “He was so generous when it came to other people, so this is a way to embrace the spirit of who he was.”

“It’s a lot of working putting it together, but it is all worth it,” Powers said, “because when you see the people come together, and you can see how they know my dad and how they remember him, and this just makes me feel like we are doing something positive.”

Click here for more information on how you can help the NBTS.