High Quality Content by WIKIPEDIA articles! Arden Valley Road is a scenic road located in Southfields, New York, United States, that travels through Harriman State Park and is owned by the Palisades Interstate Park Commission. At 5.1 miles (8.2 km) long, it begins at New York State Route 17 (NY 17) in Southfields and ends at Seven Lakes Drive in Harriman State Park. The road is located entirely in Orange County and is home to the Elk`s Pen Trailhead in Harriman State Park. In 1927, plans arose to construct the road, which was built in 1930 and stretched along the borderline with the Harriman estate. Major William A. Welch ordered 75 elk from Yellowstone National Park to be placed in a wired cage between Arden and Southfields in 1919. After the elk were gone by 1942, the area became known as Elk`s Pen Trailhead.