Bellevue Collection: Halloween Family Fun Fest, Bellevue Square and Lincoln Square, 4:30-7:30 p.m., Oct. 31, trick or treating and activities for kids. Downtown Bellevue

Bellevue Arts Museum: BAM-O-WEEN! 1-4 p.m., Oct. 31, free admission and Halloween-themed art activities for kids.

Bellevue’s Market Place at Factoria Mall: Free family Halloween Party, co-hosted with Radio Disney 1250, from 3-4:30 p.m. Saturday, Oct. 31. The Radio Disney team will have activities for the kids, along with prizes, and every child will receive a free bag they can use for trick or treating the mall merchants. All of the Mall’s restaurants and shops will be open until 8:30 p.m. The Radio Disney stage will be set up at the Mall’s south court. More information is available at www.factoriamall.com.

Mercer Island’s Haunted Forest: Alone in the Dark is a 45-minute guided tour through the shadowy trails of Mercer Island’s Island Crest Park through Nov. 1. Venture into the otherworld where four Lost Souls are trapped in a mystifying and ever-changing forest. Only you can guide them past the phantasms and malevolent temptors that lurk among the trees and bind them to the dark. Tour groups are set at a maximum of 15 people. Tickets are $15 for adults, $13 for youth with a food donation and are cash or check only. The event goes on rain or shine. All guests are encouraged to dress appropriately and wear suitable shoes. If it is raining, attendees are encouraged to bring a hat and not an umbrella.