ROANOKE, Va. -

"Diagnosed August 2011. Had symptoms since I was 18," recounts David Chedester.

The last years have been a journey for Chedester.

From devastating diagnosis and acceptance to putting that energy into movement and running the New York City Marathon in November as part of Team Fox.

"It took me 5.5 hrs to run it. I'm a chubby kid from Kentucky, I hate running but man, crossing that finish line I can't even explain what that feeling is," he says. "Crossing that finish line was the icing on the cake .. it was an unbelievable experience."

For the second year in a row, Chedester raised $5,000 for the Michael J. Fox Foundation.
The actor has been living the disease since the 90s.
Now Fox's foundation has invited him for another challenge.

"Are you ready?" asks the reporter.
"I don't think you're ever really ready to hike the Grand Canyon, but I guess I'm about as ready as you could be," laughs the now 30-year-old.

He and about 12 others will hike the canyon from the South Rim to the North Rim in one day.
In all about 25 miles.

"It's about 6,000 feet above sea level which is about three times as high as what the Mill Mountain Star is, so it's pretty high. The hike goes down to the canyon so you get to about 1,800 feet above sea level going down and then coming back up you get up to almost 8,500."

When WDBJ7 first met Chedester two years ago, he says he was on nearly a dozen medications a day.

Today, he is medicine free and keeping his Parkinson's symptoms at bay with clean eating and lots of exercise.

His hike in the Grand Canyon is just under a month away.

He's already raised $2,500.

To keep up with his progress, click here: http://www2.michaeljfox.org/site/TR/Sponsored/TeamFox?px=1006451&pg=personal&fr_id=1510