Stone masonry canal aqueduct spanning the Monocacy River, showcasing 19th-century engineering along a scenic towpath.

How to Get There

From Washington, DC (40 mi): Take I-270 N to MD-28 W, continue on MD-109 N, then turn left onto Mouth of Monocacy Rd to reach the aqueduct.

Overview

The Monocacy Aqueduct is the largest of the 11 aqueducts on the Chesapeake and Ohio Canal, a marvel of 19th-century engineering that spans the Monocacy River. Completed in 1833, the aqueduct is constructed of large granite blocks and features seven graceful arches. It played a vital role in transporting goods along the canal and remains a testament to early American infrastructure and ingenuity.

Today, the aqueduct is part of the C&O Canal National Historical Park and is a popular destination for hikers, cyclists, and history enthusiasts. The surrounding area offers scenic views, wildlife observation, and access to the Potomac River. Restoration efforts have preserved its structural integrity, allowing visitors to walk across the aqueduct and imagine the bustling canal traffic of centuries past.