The Celina Lake Festival will be July 26-28. Enjoy festival activities centered around beautiful Grand Lake St. Marys — Ohio’s Largest Inland Lake! A spectacular fireworks display over the Lake as well as a Boat Poker Run, the International Amphicar Convention are just some of the fun events. Add to that rides, a classic car show, a huge parade, festival foods, craft show, 5K run, a variety of fantastic live music by, and we sure can’t forget the sidewalk,children’s games, completion’s & rides for a terrific weekend of activities!!!