Riverfest

From Riverfest Website:

Riverfest is the culmination of a summer of activity at Assembly Row. In partnership with The City of Somerville, Somerville Local First, and DCR, celebrate all that is great about the neighborhood! Join us for a day full of live local music, dozens of local artists, free childrens activities, and of course the annual fireworks show over the Mystic River at sundown.