The Ball Property, also known as the Harvey Ball Conservation Area, is a 15 acre park,  is completely wooded, and connects the Broad Meadow Brook Conservation Center and Wildlife Sanctuary with the Blackstone River Bikeway. It features one hiking trail, the Smiley Face Trail, which starts at Granite Street and connects to Broad Meadow Brook’s Sprague Trail.

The land for the Ball Property was secured with a $500,000 grant from the state Department Conservation Services. The Audubon Society fundraised an additional $250,000, which was matched by a contribution from the city.

The land was purchased from the Ball family in 2007. The name of the park and it’s trail were named in honor of the late Harvey Ball, the Worcester native famed for designing the smiley face.