St. Mark Catholic Church will open its parking lot for a free Trunk or Treat on Friday, Oct. 23, at 9970 Vale Road in Vienna.

The event is free. Volunteers begin decorating car trunks in the Early Learning Center lot at 5 p.m. The lot closes at 5:45 p.m., and treating begins at 6 p.m. Winners of a trunk-decorating contest are announced at 6:45 p.m. in five categories: Best Theme, Best Group, Most Original, Scariest and Kid's Choice. The event ends at 7 p.m., with cars dismissed by 7:15 p.m., according to the event flyer.

The church is looking for volunteers, who receive free pizza and a prime parking spot. Families can also pre-order pizza and beverages. Sign-up and ordering links are on the church's event page.

Children must have adult supervision at all times. Drop-offs are not permitted, alcohol is prohibited, and costumes and decorations must be family-appropriate.

For questions, contact St. Mark Catholic Church at 703-281-9100.

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