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Festival
Saturday, September 19, 2026 · 1 PM – 5 PM
Fluff Fest 2026
FreeFamily-friendly
What the Fluff? A Tribute to Union Square Innovation is a madcap festival honoring the invention of Marshmallow Fluff, returning for its 21st year with live music, fluffalicious feasts, sticky games, and zany happenings. The festival runs from 1–5pm in Union Square, Somerville. MassBike will be offering free bike valet for all festival attendees.
Date
Saturday, September 19, 2026
Time
1 PM – 5 PM
Where
Union Square, 366 Somerville Ave, Somerville, MA 02143
Organizer
Union Square Main StreetsWalking, biking or taking transit there?
Shift counts the trip without you touching anything and turns it into money saved and perks from local businesses. It's free.
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