MINNEAPOLIS (WCCO) — It may be hot outside but that isn’t stopping one man from running 24 hours straight.

Tom Knoll, a 79-year-old retired U.S. Marine, is in the middle of such a run.

At the end of May, he started a 1,600-mile trek across the United States from New Orleans to International Falls, Minn. to raise money for various charities.

Knoll was in Minnetonka, Minn. on Saturday helping raise money to send a little girl to Disney World.

Knoll is circling the track at Minnetonka High School to raise money for a 12-year-old named Rose, who suffers from Cerebral Palsy.

Her dream of visiting Disney World is expensive, and Knoll is helping a group called “The Sunshine Foundation” raise money for her trip.

“It’s amazing a human can take the time to do this. It’s hot out here and he’s giving an entire day for this. And some people won’t even hold the door for us,” said Rose’s Mom, Kathryn DeWitt.

Since 1976, Knoll has raised $1 million for charity through running.