CHICAGO (WLS) — Hundreds climbed the stairs of the Willis Tower Sunday morning to raise money for a good cause.

It’s all part of the Shirley Ryan AbilityLab’s annual Skyrise Chicago event.

The nonprofit helps adults and children recover from severe injuries.

And those who participated Sunday in the 13th annual event climbed 105 floors.

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Laura Ferrio, senior VP for the Shirley AbilityLab, said they wanted to raise $1 million.

“It’s absolutely amazing,” she said.

Patients, staff, teams and corporate sponsorships climbed Sunday, Ferrio said.

Patient Greta Pearl survived a car crash in 2019 and participated in the event.

“Last time we had this in 2019, I was the giving the medals, now I’m the one actually receiving the medal, so I’m really excited for that,” Pearl said.