Halloween Party (O'Neill)

Sat · Oct 31·CanalSide Food + Drink at CambridgeSide · Cambridge

Cambridge Half Marathon takes place at CanalSide Food + Drink, CambridgeSide.

Sat · Oct 31·1 AM·MIT events calendar · Cambridge

Women's Openweight Crew competes against the Head of the Fish Regatta on Fish Creek in Saratoga Springs, NY.

Sat · Oct 31·1 AM·MIT events calendar · Cambridge

Men's cross country race versus NEWMAC Championships held at Smith College in Northampton, MA.

Sat · Oct 31·9:15 AM – 11 AM·Patagonia Cambridge, 39 Brattle Street, Cambridge, Massachusetts, 02138

Spooky Halloween Run Club at Patagonia Cambridge, hosted by the Charles River Watershed Association.

Fri · Oct 30·4 PM – 5:30 PM·O'Connell Branch · Cambridge

Professor Bugman's 'Spooky Bones and Creepy Crawlies' program at O'Connell Branch features handling animal bones, skulls, skeletons and comparing them to arthropod exoskeletons, treats provided, ages 5–11.

Fri · Oct 30·11 AM – 11:30 AM·O'Connell Branch · Cambridge

Stories, songs, and rhymes for children ages 2‑5 and caregivers at O'Connell Branch, Cambridge, for ages 5 and under.

Thu · Oct 29·5 PM – 9 PM·Harvard Museum of Natural History, 26 Oxford St, Cambridge, MA

Halloween adventure at Harvard Museum of Natural History includes trick-or-treating galleries, photo booth, costume-inspired nature displays, rare specimen encounters, and a free raffle.

Fri · Oct 23·10:30 AM · 3 PM·Central Square Branch — Central Square Literacy Center · Cambridge

High beginner ESOL class at Central Square Literacy Center, no testing required, for adults 18+, contact Maria Balestrieri for details.

Fri · Oct 23·4 PM – 5 PM·O'Neill Branch — Conference Room · Cambridge

Game show-style competitions like Wheel of Fortune, Jeopardy, Trivia, and Bingo run in the O'Neill Branch conference room, with snacks provided, for ages 5–11.

Sat · Oct 24·9:30 AM – 11 AM·Main Library — Fab Lab, The Hive · Cambridge

Hands‑on 3D printing workshop in the Main Library Fab Lab, using Prusa printers and Tinkercad to create models and earn a printing certification, for ages 18 and up.