For more than 165 years the trail atop the Old Croton Aqueduct has linked communities along the lower Hudson River. Just a few feet beneath the trail lies the masonry tunnel that first brought clean water to New York City. Now a National Historic Landmark, the Aqueduct is one of the great engineering achievements of the 19th century.

In 1968 New York State purchased from the city the land and structures that constituted the Weschester County section of the Old Croton Aqueduct, between Croton Gorge Park and the Yonkers-New York City line. This 26.2-mile portion of the total 41-mile Aqueduct route became the Old Croton Aqueduct State Historic Park, a recreational and cultural resource that appeals to a wide range of visitors. Tree-lined and grassy, traversing local villages and varied landscapes, the trail offers the pleasures of nature nd glimpses of historic and architectural treasures along the way. Twenty-tow miles are a designated part of the Hudson River Valley Greenway Trail, and sections are being incorporated into Westchester County's RiverWalk.