Hiking in the Chesapeake and Ohio Trail: trails, map and practical info

The Chesapeake and Ohio Canal Trail — commonly known as the C&O Canal Towpath — is one of the most historically rich and scenically rewarding long-distance trails in the eastern United States. Running alongside the Potomac River, this flat, packed-dirt path follows the route of a 19th-century canal that once served as a vital commercial waterway. Today it draws hikers, cyclists, and history enthusiasts who come to experience both the natural beauty of the Potomac corridor and the remarkably preserved remnants of American industrial heritage.

A Trail Built on History

Construction on the Chesapeake and Ohio Canal began in 1828, with the ambitious goal of connecting the tidal waters of the Chesapeake Bay to the Ohio River valley. The canal never quite reached its destination — it terminated in Cumberland, Maryland — but it operated for nearly a century, moving coal, lumber, and agricultural goods through a system of locks, aqueducts, and lift stations. When the canal was finally abandoned in the early 20th century, Supreme Court Justice William O. Douglas famously championed its preservation, helping pave the way for its designation as a National Historical Park. That legacy is visible at nearly every turn along the towpath: stone lockhouses, hand-built aqueducts, and original lock gates still dot the corridor.

What the Trail Looks Like

The towpath itself is wide, relatively smooth, and runs almost entirely flat — a direct result of its origins as a working canal path where mules once pulled loaded boats. The surface is a mix of packed gravel, crushed limestone, and natural dirt, which can become muddy and soft after heavy rain. Overhanging tree canopy keeps much of the trail shaded, making it more comfortable during warmer months than many exposed ridge trails in the region.

The trail passes through a variety of natural environments as it moves through the Potomac River valley. Bottomland hardwood forests, wetland areas, and rocky river banks create a shifting landscape that keeps the experience interesting over long stretches. The Potomac River is a near-constant presence — sometimes calm and wide, other times rushing through narrow rocky channels — and the views across to the Virginia shoreline are a recurring highlight.

Landmarks and Points of Interest

One of the most impressive engineering features along the trail is the Paw Paw Tunnel, a hand-drilled brick tunnel stretching nearly a mile through a mountain — a remarkable feat of 19th-century labor. Great Falls, located closer to the Washington D.C. end of the trail, is another standout: the Potomac drops dramatically over a series of jagged rock ledges, creating a powerful cascade that draws visitors year-round. Harpers Ferry, where the Potomac and Shenandoah rivers converge, is a short detour from the towpath and offers significant Civil War history alongside striking river scenery.

Throughout the corridor, original lockhouses have been preserved and some are available for overnight stays, giving visitors a genuinely unique way to experience the trail. Numbered mileposts mark the entire length of the towpath, making navigation straightforward even without a detailed map.

Who This Trail Is For

Because the towpath is flat and well-marked, it works well for a wide range of users. Day hikers can pick any access point and walk as far as they like before turning back. Backpackers use the trail's network of hiker-biker campsites — spaced roughly every five miles — to complete multi-day trips. Cyclists are a common presence, and the towpath is one of the most popular long-distance bike routes on the East Coast. Families with kids handle shorter sections without difficulty, particularly near the more developed access points where parking and facilities are available.

That said, the trail's length and remote stretches mean that anyone planning an extended trip should come prepared. Some sections are far from road access, cell service can be unreliable, and trail conditions vary significantly depending on recent weather and seasonal flooding.

Practical Information

• Access: The trail has numerous access points along its length, from the Washington D.C. area all the way to Cumberland, Maryland. Many entry points have parking areas, though availability and fees vary by location.
• Camping: Hiker-biker campsites are distributed along the trail and are available on a first-come, first-served basis. Some drive-in campgrounds are also located within the park.
• Dogs: Dogs are permitted on the towpath and must be kept on a leash at all times.
• Bikes: Cycling is allowed on the towpath for its entire length.
• Trail surface: Packed gravel and natural dirt — expect muddy conditions after rain or during spring snowmelt.
• Managed by: The National Park Service as part of the Chesapeake and Ohio Canal National Historical Park.

What Makes It Stand Out

Most long trails in the eastern U.S. involve significant elevation change — ridge climbs, rocky scrambles, sustained ascents. The C&O Canal Towpath is the exception. Its flat grade and consistent surface make it accessible to people who might not tackle more technical terrain, while its sheer length and historical depth give experienced trail users plenty to engage with. The combination of river scenery, intact 19th-century infrastructure, and a well-maintained corridor through the Potomac valley makes this one of the more distinctive trail experiences available anywhere along the East Coast.

Whether you're walking a few miles near Great Falls on a weekend afternoon or committing to a week-long end-to-end journey, the Chesapeake and Ohio Canal Trail delivers a trail experience that's genuinely hard to replicate anywhere else in the region.