The City of Gaithersburg’s SummerFest will take place on Saturday, June 28, 2025, from 6pm to 11 pm. Gaithersburg’s free, illuminating summer festival will take place on the grounds of Bohrer Park at Summit Hall Farm. “Enjoy live music, food trucks, local breweries, and family-friendly activities—culminating in a spectacular fireworks display and SummerGlo After Party.”