Mercer Island Girls' Lacrosse Club PO Box 444, Mercer Island, WA98040 MI Girls' Lacrosse Club runs girls' lacrosse teams on the island. It offers elementary, middle and high school…More programs divided into Division 1, 2 and JV teams. Because lacrosse is not a sanctioned FIAA school sport, MI Girls' Lacrosse is operated at the club level. The club's board is made up entirely of parent volunteers. As team and equipment fees can be quite hefty, the club offers scholarships for families who can prove a need for financial assistance.