Windmill Hill Park is a waterfront park located at 501 S Union St. Alexandria in the Old Town South. The park is split up into two sections by a quiet street. On one side, there's a kid's playground, basketball court, and open space. On the other side, is the Potomac and a paved trail that follows the water. There is fun for all family members here, including the dog as there is a dog park across the street. Windmill Hill Park is set up on a hill overlooking the Potomac. Windmill Hill includes a playground for kids with slides and swings as well as a basketball court. A stone wall runs across the top of the hill with benches set for a full view of the river as well as the fields below that are always filled with soccer balls, baseballs, footballs, and lacrosse sticks. Great place for sledding when it snows with an expansive slope that carries sleds from top to bottom. The Park is along the Potomac River and has undergone extensive construction and ecological restoration. Features include improved habitat areas, a new dog park, water access and more. The park remains open from 6 am to 10 pm.