The Harsens Island Schoolhouse Grille is pleased to sponsor the 5th Annual Roots Music Festival on the grounds of the Schoolhouse Grille on beautiful Harsens Island. Along with music you will find artists and crafters of many varieties and flavors, food and beverages, including an incredible fish fry, a beer tent with craft beers and wine tastings to suit many tastes and preferences. Bring a lawn chair, your favorite friend or friends, or come alone and meet someone during this casual and easy summer day. While here, take a few minutes to visit the Old Schoolhouse. The Harsens Island Schoolhouse Grille is a historic treasure, built in 1934. It operated as one of Michigan's only two room schoolhouses until its closing in 2005. Ticketed event.