The International Seaplane Fly-In is a non-profit organization with a mission to promote fellowship, personal contact, and unification among seaplane pilots and to encourage aviation enthusiasts to pursue their passion. The fly-in attracts thousands of people to Greenville and the Moosehead Lake region every September to enjoy the spectacular aviation event, poke around the unique shops, enjoy the abundant outdoor adventures and celebrate fall in Maine. Come and watch your favorite pilots compete in the contests and enjoy the sights and sounds of the seaplanes!