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

Arbor Day planting event

This Arbor Day, Oct. 21, the city of Mercer Island and Mountains to Sound Greenway are hosting the annual Arbor Day Planting Event from 9:45 a.m. to 1 p.m. in Luther Burbank Park along the newly-constructed south shoreline trail. For more information, visit: https://tinyurl.com/224unsab

I-90 overnight closure

Washington State Department of Transportation is planning an overnight closure of westbound Interstate 90 between Mercer Island and Seattle scheduled for Oct. 20. Westbound I-90 will be closed from Island Crest Way to the Seattle side beginning at 10 p.m. Oct. 20 and will reopen at 6 a.m. on Oct. 21.

Miriam Landis. Courtesy photo

Landis releases ‘Lauren in the Limelight’

Mercer Island author Miriam Landis will discuss her new book, “Lauren in the Limelight,” a story for the next generation of young dancers, with Nancy Pearl at 4 p.m. on Oct. 22 at Island Books, 3014 78th Ave. SE. The book is set in the world of the Pacific Northwest Ballet, where Landis is an instructor, and features illustrations by Jill Cecil. For more information, visit: www.miriamlandis.com.