Immediately south of the Crane Road Viaduct, the park drive passes under the Ardsley Road Bridge, a rigid-frame reinforced concrete bridge faced in stone dating to the original parkway construction. The Ardsley Road Bridge has a decorative parapet and a picturesque stone staircase designed to provide access to paths along the Bronx River. Tubular steel handrails have been added to the stairs and parapet. There are entrance and exit ramps to and from the bridge from the southbound lanes. One of the few remaining original-style rustic wooden light poles can be found adjacent to the west-side access road.

Just south of Ardsley Road, the road separates into two one-way roads as it curves through Garth Woods on its original alignment. This is one of the few sections where the original parkway drives were divided by a substantial median to improve safety and protect attractive landscape features. The driveways in this section retain much of their historic character and provide a more enclosed forest-like experience as motorists pass along the narrow two-lane roadway underneath towering tulip trees. The southbound lanes are classically curvilinear, while the northbound lanes are slightly straighter. This section is straight because it follows the alignment of a previously cleared strip for the Bronx Valley Sewer, which is in the center right of the northbound lanes. Near Mile Marker 6.6, the southbound lanes through Garth Woods are immediately adjacent to the Bronx River, but jersey barriers block the motorist’s view of the river. The jersey barrier is considered a temporary measure to protect retaining walls along the eastern edge of the travel lanes. The northbound lanes through Garth Woods cross the Bronx River over a bridge near Mile Marker 6.4. The remains of one of the parkway’s early timber footbridges can be found in the median between the two roadways. Emerging from the woods on the northbound lanes, motorists have an expansive view of the road, the Ardsley Road Bridge, and an open meadow. Trees recently planted in the meadow to the east of the parkway drive may eventually alter this composition.

Southbound motorists emerging from Garth Woods cross Harney Road at an at-grade intersection controlled by traffic signals across both the southbound and northbound lanes. The Harney Road Bridge over the Bronx River was originally designed by Charles Stoughton as a reinforced-concrete bridge faced in stone; the bridge was reconstructed and widened by the county in 2000 to match the original design. South of the intersection, the northbound lanes are carried over the Bronx River on a concrete arch bridge faced in stone. The roadways then merge at Mile Marker 6.0 and are separated by a w-beam guide-rail median.

The Harney Road gas stations, one situated on each side of the parkway drive, are located at Mile Marker 5.9. These rustic stone structures were constructed in 1935. The east building was reconstructed in the 1970s. As of summer 2001, they were empty and the gas pumps had been removed. The gas stations are in an open meadow area with groups of trees. The alignment is straight as the road proceeds south to Leewood Drive at Mile Marker 5.5. Bridges carry the park drive over the Bronx River immediately north and south of the Leewood Drive intersection. The bridges were being reconstructed during the summer of 2001. Associated repaving projects were expanding the breakdown lanes on either side of the roadways, altering the historic proportion of pavement to natural scenery.

Near Mile Marker 4.8, an exit leads to Vermont Terrace and Thompson Street. The parkway drive passes under the Thompson Street Bridge, a rigid-frame concrete arch bridge faced in stone. Immediately south of the bridge, the road has been recently paved and wider shoulders added. On the east side of the parkway drive south of Thompson Street is Crestwood Lake, with wide meadow areas and groups of trees. On the west side of the road, there is no vegetation to screen adjacent houses from the parkway. The road curves as it traverses a slight hill and approaches the Read Avenue exits at Mile Marker 4.5. Read Avenue does not intersect the parkway, but is accessible from both the northbound and southbound lanes.

Immediately south of Read Avenue is an at-grade intersection with traffic signals at Scarsdale Road. The intersection was widened in order to separate the northbound and southbound lanes, with left-turn lanes situated in an island between the opposing roadways. Approximately .2 miles south of Scarsdale Road, the park drive continues under the Parkway (Park Avenue) Viaduct, a concrete double-arch bridge faced in stone. The park drive passes through the west arch of the viaduct and an access road from Elm Street passes through the east arch to the northbound lanes.