Fluff Fest: What the Fluff?

Sep
20
Saturday, September 20, 2025 at 02:00 PM

What the Fluff? A Tribute to Union Square Innovation is a madcap festival honoring the invention of Marshmallow Fluff, returning for its 20th year to the delight of Fluff enthusiasts from Greater Boston and beyond.

It celebrates Somerville’s proud tradition of innovation with live music, fluffalicious feasts, sticky games, zany happenings, and much more.

Think you’ve got the right stuff for Fluff? Join in for all the sticky fun.

Event Website

Facebook Page with updates

Looking to volunteer? 

MassBike is looking for folks to volunteer at the Bike Valet, sign up here!

Recent responses

Location

Somerville Avenue (between Warren Ave and Dane Street)
15 Warren Ave
Somerville, MA 02143
United States
Google map and directions

Event contact

Union Square Main Streets