Upcoming events in Prince William County

Wednesday, Oct. 31

Halloween // Oct. 31

Boo Bash: 5-7 p.m. Potomac Mills, 2700 Potomac Mills Circle, Woodbridge. For children 12 and under. Free entertainment and candy, Reptiles Alive show, come in costume. Free.

Halloween Celebration: 3:30-5:30 p.m. Manassas Park Community Center, 99 Adams St., Manassas Park. Trick or treating, face painting, balloon twisting and more. Rain or shine. Free.

Trunk or Treat: 5:30-7 p.m. Market Place at Madison Crescent, U.S. 29 and U.S. 15, Gainesville. Free.

Annual Mall-O-Ween Trick or Treat: 5-7 p.m. Costumes encouraged. Manassas Mall, 8300 Sudley Road, Manassas. Free.

Thursday, Nov. 1

Bull Run Mountains Naturalist Hike: 9-11 a.m. Join a professional naturalist and see the plants and animals of the local region. Bull Run Mountains Conservancy, 17405 Beverley Mill Drive, Broad Run. Free.

Elections in Prince William County: 11 a.m. For adults. Presentation on how elections have evolved over time in the county. Bull Run Regional Library, 8051 Ashton Ave., Manassas. Free.

Day of the Dead Celebration: 5:30 p.m. Celebrating Hispanic Heritage Month. Food, fashion show and more. NOVA Woodbridge Campus, 2645 College Drive, Woodbridge. Free and open to the community.

Friday, Nov. 2

Fall Gallery Walk: 6-9 p.m. Artwork from local, featured artists will be on display. Historic Downtown Manassas, Center St., Manassas.

Novant Health Auxiliary Holiday Bazaar: 10 a.m.-5 p.m. All proceeds benefit patient care at Prince William Medical Center and Haymarket Medical Center. Prince William Medical Center, 8700 Sudley Road, Manassas.

Saturday, Nov. 3 10

10th Annual Northern Virginia Veterans Parade: 11 a.m.-12:30 p.m. Historic Downtown Manassas, Center St., Manassas.

Novant Health Auxiliary Holiday Bazaar: 10 a.m.-3 p.m. All proceeds benefit patient care at Prince William Medical Center and Haymarket Medical Center. Prince William Medical Center, 8700 Sudley Road, Manassas.

Autumn Photography at Bull Run Mountains: 10 a.m.-1 p.m. Featuring Jack Kotz, local photographer. All skill levels welcome. Bring your own camera and equipment. Bull Run Mountains Conservancy, 17405 Beverley Mill Drive, Broad Run. $10.

Hike with a Historian: 9 a.m.-1 p.m. Historian John Hennessy will lead the hike. RSVP to 703-754-0791. Manassas National Battlefield Park, 6511 Sudley Road, Manassas. $30 members, $45 non-members.

OSS Day: 10 a.m.-2 p.m. A park ranger will take visitors on a hike to look at a WWII OSS training area. The hike is not accessible for wheelchairs, walkers, strollers or babies in backpacks. Wear sturdy footgear. Rain or shine. Prince William Forest Park, 18100 Park Headquarters Road, Triangle.

Sunday, Nov. 4

Mattress Sale: 10 a.m.-5 p.m. Hosted by Osbourn High School. All proceeds support the school orchestra program. Osbourn High School, 9005 Tudor Lane, Manassas.

Linton Hall School Open House: 1 p.m. Meet the teachers, school tour and presentation. Linton Hall School, 9535 Linton Hall Road, Bristow. Free.

Monday, Nov. 5

Storytime with Kerry Molina: 10:30 a.m. For ages 4-10. Local author Kerry Molina will read her book Kaci Keeps Going. Copies will be available for sale. Dale City Neighborhood Library, 4249 Dale Blvd., Dale City. Free.

Critters and Conservation presents Awesome Animals: 10:30 a.m. For families. See a live tenrec and degu, watch a parrot dance and more. Chinn Park Regional Library, 13065 Chinn Park Drive, Woodbridge. Free.

Tuesday, Nov. 6

Remember our Vets // Nov. 6

Remembering our Veterans: 3 p.m. For all ages with caregiver. Come make a card to give to local veterans. All supplies provided. Nokesville Neighborhood Library, 12993 Fitzwater Drive, Nokesville. Free.