WF Staff - June 8, 2023 0 Mount Vernon Estates Enrichment & Extracurricular Activities Open 365 days a year. Explore 50 acres of gardens and historic grounds, a working 18th-century farm, and hands-on history center. Hours: 8 a.m. – 5 p.m. Listing ID: 26321 Contact details 3200 Mount Vernon Memorial Hwy., Mount Vernon, VAFairfax County,22309