Youth Theatre Northwest (YTN) celebrates the Halloween season with an outdoor performance of “Quarantine”: Mercer Island’s Haunted Forest,” playing now to Oct. 31.

In contrast to a traditional haunted house, “Quarantine” is a 40-minute guided performance and tour through the shadowy of Island Crest Park. Only parties of 10 or fewer will be permitted to go through at a time. Trick-or-treaters are encouraged to come Oct. 31.

The show is appropriate for ages 9 and older. A less frightening version of the show, “Once Upon a Halloween” will be performed during the day on Sundays for children age 3 and older.

“Quarantine” is performed outdoors, rain or shine. All guests are encouraged to be prepared for rain and wear suitable shoes.

For more information, go to http://www.youththeatre.org/. Island Crest Park is located at 5500 Island Crest Way, Mercer Island.