Hyde Park is a borough in Westmoreland County, Pennsylvania, United States. The population was 509 at the 2020 census. Located between the borough of Hyde Park and the borough of Leechburg, the footbridge, locally known as "The Walking Bridge", is a suspension bridge that stretches 600 feet across the Kiskiminetas River. It is one of the long…Hyde Park is a borough in Westmoreland County, Pennsylvania, United States. The population was 509 at the 2020 census. Located between the borough of Hyde Park and the borough of Leechburg, the footbridge, locally known as "The Walking Bridge", is a suspension bridge that stretches 600 feet across the Kiskiminetas River. It is one of the longest pedestrian suspension footbridges in the United States, and one of the only pedestrian bridges to connect two counties, in this case, Westmoreland and Armstrong counties. The official name of the bridge is the Armstrong County Bridge #13.