Get ready for one of Somerville’s favorite Halloween traditions! SomerStreets: Monster Mash transforms Somerville Avenue into a festive Halloween celebration for all ages. Join us on Sunday, October 18, from 1–5 PM (severe weather date: Sunday, October 25) for live music, interactive art activities, family fun, local food vendors, and more.
An afternoon to bring neighbors together and celebrate local arts and culture, Monster Mash features performances on two stages, hands-on activities, community organizations, local businesses, and plenty of Halloween spirit around every corner.
Monster Mash Costume Parade:
The highlight of the day is the spookiest community Halloween Parade, led by the School of Honk. Dress up in your favorite costume and join neighbors of all ages as superheroes, witches, monsters, magical creatures, and everything in between march through the festival together.
Food Vendors:
Enjoy delicious bites from local vendors throughout the festival!
- Straight A’s BBQ & Things
- BanglaAdda Bengali
- Dos Manos Kitchen
- Gracie’s Ice Cream
- Festival’s favorite foods, fried dough and lemonade
Activities:
The highlight of the day is the spookiest community Halloween Parade, led by the School of Honk, but there’s so much more!
- Parkour
- Carve pumpkins with Somerville Recreation
- Don’t miss the photo opps with Anne Cubberly Giant Puppets
- Facepainting with Face Art
- Touch a trucks featuring Fire truck, Ambulance, and Police car!
- Live Caricatures and Illustration with Alejandro
- Inflatables and lawn games by EventThem
- Come visit Play Union and meet Bluey and Minnie Mouse!
Live Music by local artists
Stage at 31 Union Square
- Welcome performance by the BosWitches
- Proyecto Tempo
- Erika Renée Williams
- Los Mambiseros
Stage at Church St – Curated by Mass Ave Music:
- Gene Dante & the Future Starlets
- Mike Gent
- The Handymen
Come in costume, support local artists and businesses, and enjoy an afternoon of creativity, music, and community. Free and open to all!
Be Part of Monster Mash!
Accessibility Needs:
Persons with disabilities who need auxiliary aids and services for effective communication (i.e., CART, ASL), written materials in alternative formats, or reasonable modifications in policies and procedures in order to access the programs, activities, and meetings of the City of Somerville should contact the ADA Coordinator in advance at 617-625-6600 x 2059 [email protected].
The City of Somerville can provide you with an interpreter in your language for free. To request an interpreter, please contact us at [email protected] or call 311 (617-666-3311) at least 7 days in advance of this event.
When
Sunday, October 18, 2026
1:00pm – 5:00pm
Where
Map UnavailableSomerville Ave between Church St and Union Sq
52 Union Sq
Somerville, MA 02143