Hopkinton Girl Scout Troop 72361 will host a trunk or treat event in the parking lot of Marathon Elementary School on Sunday, Oct. 18, from 2-4 p.m. The event costs $20 per family and is cash only. It will open at 1:45 p.m. to offer a sensory-friendly experience to interested families. All proceeds benefit Troop 72361’s Gold Award fund. Email troop leader Cristina Medeiros at cmedeirosslp@gmail.com with any questions.