Borough Line Park Mountain Blvd & Glenwood St, Emmaus, PA18049 This 5.5-acre park is nestled against the base of South Mountain. The northernmost park in Emmaus, it can be reached by…More driving to the end of either Alpine or Glenwood streets. A parking lot is available on the Alpine Street side of the park. Borough Line got its name because it is along the eastern borough line, adjoining Salisbury Township. It has a baseball field, a picnic pavilion, two tennis courts, a basketball court, volleyball, swings and playground equipment. The park is next to Wildlands Conservancy's South Mountain Preserve, which has a trailhead at the end of Alpine Street.