Hunter Gandee of Michigan walked 57 miles while carrying his younger brother Braden, who has cerebral palsy, on this back.

Last year, Hunter Gandee of Michigan walked 40 miles while carrying his younger brother Braden, who has cerebral palsy, on his back. 

This time around, the awareness-raising trek the teen took with his 8-year-old sibling stretched 57 miles. 

When Gandee was close to his final destination, he felt tired but told the Associated Press that he "got a burst of energy at the end."

It allowed him to overcome the soreness he was feeling and forge ahead. 

Also helpful in completing his mission was the immense amount of support he received over the w