A movie based on a true story in Maine will be screened at the Maine International Film Festival in Waterville in July.

Named the No. 1 best-selling children’s book on Amazon with the same name, “Lost on a Mountain in Maine” is a movie about Donn Fendler, a boy who survived nine days in the woods of Mount Katahdin in the 1930s.

Fendler was 12 at the time when he got lost on a hiking trip after a heavy fog rolled in. He eventually wandered 35 miles over nine days until he was found at a hunting camp in Stacyville.

After surviving, he was honored with parades across Maine and by former Gov. Lewis Barrows, who gave him a gold medal. The following year, former President Franklin Delano Roosevelt presented Fendler with an award for valor.

He had a successful military career before dying at the age of 90 in 2016.

The book has been a staple in the education system for generations, as it’s been a reading requirement for schoolchildren in Maine and across the country.

Fendler made trips before passing away to Maine classrooms to talk about his experience and how he survived.

This comes as the group announced on Facebook that the movie will be released nationwide this fall.

Film Festival pass-holders can purchase tickets to watch the movie now, while tickets to the public will be available to purchase starting Friday, June 14.