The Camas-Washougal Chamber of Commerce will host “Trick or Treat On Main Street” from 4 to 6 p.m. Oct. 31, rain or shine. Attendees should park at the Pendleton Outlet at 2 Pendleton Way, Washougal, and walk a block north to Main Street. Downtown merchants will hand out free Halloween candy to costumed children. Attendees can pick up their merchant passport at the chamber’s tent inside Reflection Plaza at the corner of Pendleton Way and Main Street. Those who return completed passports get a Halloween treat bag and are entered into a drawing to win a prize. For more details, contact Jennifer Senescu at 360-834-2472 or info@cwchamber.com.