The Nine-Mile run Watershed is located in the Regent Square/Edgewood area of Pittsburgh and covers ~6.5 square miles. It boasts a stream and breathtaking scenery. It includes hiking trails and the largest urban stream restoration completed by the Army Corp of Engineers. The Nine Mile Run Watershed Association, is s non-profit organization located at 321 Pennwood Ave., supporting preservation of the site. They maintain a Facebook site and sponsor social and fund-raising events.