Mercer Island will celebrate the spooky season with the upcoming Hallo-Weekend. Enjoy trick-or-treating from 4-6 p.m. on Oct. 27 in Town Center, and the annual Pumpkin Walk will take place from 5-8 p.m. on Oct. 29 in Mercerdale Park. For more information, visit: https://tinyurl.com/2fk7z884