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Mount Arlington’s annual Halloween Bash returns to Fireman’s Field on Saturday, October 17, 2026, from 3 to 5 p.m. The free community event, hosted by the Borough of Mount Arlington, centers on a Trunk or Treat for kids and brings local vendors and businesses together for an early-evening celebration in this lakeside town.
What to expect
The Halloween Bash is built for families. Costumed kids move trunk to trunk for the Trunk or Treat, where decorated car trunks hand out candy in one contained, walkable spot. Around the field, local vendors and community groups set up tables, so there is more to do than fill a candy bag. The whole thing runs a tidy two hours in the late afternoon, which makes it easy to fit in before dinner and simple for younger trick-or-treaters who tend to fade after dark.
When and where
The event is set for Saturday, October 17, 2026, from 3 to 5 p.m. at Fireman’s Field in Mount Arlington. Admission is free. You can confirm the details and any weather updates on the Borough’s official Halloween Bash event page.
Want to set up a table?
The Borough puts out a call for vendors each year, and registration is free. Local makers, small businesses, and community organizations who want to be part of the day can reach out through the Borough of Mount Arlington to claim a spot before the field fills up.
More fall fun nearby
The Halloween Bash lands in the busiest stretch of the Morris County calendar. If you are mapping out October, our guide to fall festivals and fairs in Morris County rounds up the season, and our things to do this weekend roundup keeps the near-term lineup current. For more on this lakeside borough, see what Mount Arlington looks like on Lake Hopatcong.
Featured image based on the Borough of Mount Arlington municipal seal, courtesy the Borough of Mount Arlington.
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