Dedicated on March 19, 1979, Blackacre State Nature Preserve is the oldest state nature preserve in the KNP system. It is approximately 175 acres and located in Jefferson County near Jeffersontown. The preserve is used as an environmental education center by the Jefferson County Public School System and the Blackacre Conservancy. Indiana University Southeast operates their Urban Ecology Field Station at the preserve. Since it is located adjacent to a large metropolitan area, it offers a unique outdoor laboratory for environmental education and historic agricultural experiences to a large number of urban children who otherwise might not have the opportunity.
This area is managed by the Jefferson County Public School System and the Blackacre Conservancy through an agreement with the KNP.
Blackacre is open daily. The preserve and homestead are open on weekdays from 3 p.m. to dusk and on weekends from dawn to dusk. The Visitors Center is open on Sundays from 1 p.m. to 5 p.m. year round. Jefferson County Public School visits are scheduled by contacting the Jefferson County Public School System.