Chesapeake & Ohio Canal National Historical Park

State: Maryland (also DC). Type: National Historical Park managed by the National Park Service. Runs 184.5 miles along the Potomac River from Georgetown in Washington, D.C. to Cumberland, Maryland. Established as a national monument in 1961 and redesignated a National Historical Park on January 8, 1971. Nearly 20,000 acres of protected land; recorded 4,286,185 visitors in 2022, the most-visited NPS unit designated a national historical park.

The C&O Canal follows the towpath of a 19th-century transportation canal that once carried coal, lumber and farm goods along the Potomac River between Georgetown and Cumberland. Built between 1828 and 1850, the canal operated commercially from 1831 to 1924 before floods and railroad competition ended its working life; the federal government acquired the abandoned waterway in 1938. Today the linear park preserves the historic towpath, locks, lockhouses and aqueducts alongside a 184.5-mile multi-use trail popular with hikers, cyclists and history enthusiasts. Six visitor centers are spread along its length, with Great Falls Tavern near Potomac, Maryland, the busiest. Mule-drawn reproduction canal boat rides run seasonally from Great Falls Tavern, and hiker-biker campsites are spaced every five to seven miles for long-distance trail users.

The park is a narrow protected corridor along the Maryland (and D.C.) bank of the Potomac River, running from Georgetown in Washington, D.C. to Cumberland, Maryland, in far western Maryland. The park's mailing address and administrative office is 142 W. Potomac St., Williamsport, MD 21795; the most-visited access point, Great Falls Tavern, sits near Potomac, Maryland in Montgomery County, about 14 miles upstream from D.C.

The corridor spans a wide range of Maryland terrain, from the humid, mild Potomac tidewater near D.C. to cooler, hillier country near Cumberland in the Appalachians. The park has experienced periodic major flooding, including notable flood damage in 1996, which can close sections of the towpath. Sources consulted did not give a single detailed climate breakdown for the full 184.5-mile corridor; check current towpath and river conditions on the park website before a visit.

Spring and fall generally offer the most comfortable hiking and biking temperatures along the towpath. Mule-drawn canal boat rides at Great Falls Tavern run seasonally, April through October, per NPS visitor information, making that window appealing for visitors who want the boat-ride experience specifically.

Construction on the canal began in 1828 and was completed in 1850, reaching only as far as Cumberland, Maryland, well short of the original goal of Pittsburgh. It operated as a working commercial waterway from 1831 to 1924, primarily hauling coal from the Cumberland region toward Washington, D.C. After the Baltimore and Ohio Railroad, which had competed with and eventually absorbed the canal company, abandoned it, the federal government acquired the property in 1938. President Dwight Eisenhower designated it a national monument in 1961, and President Richard Nixon signed legislation establishing it as a National Historical Park on January 8, 1971. The towpath and its historic locks, lockhouses and aqueducts have since been preserved as one of the best-surviving examples of America's early canal-transportation era.

Popular activities include biking or hiking the towpath (which connects to the Western Maryland Rail Trail and Capital Crescent Trail), hiking the Billy Goat Trail near Great Falls, taking a seasonal mule-drawn canal boat ride at Great Falls Tavern, birding, and multi-day bike-camping using the hiker-biker campsites spaced every 5-7 miles. Ranger-led educational programs and a Junior Ranger/passport-stamp program are also available at the visitor centers.

Great Falls Tavern Visitor Center, near Potomac, Maryland, is the park's busiest site and the access point for the Great Falls overlooks and the Billy Goat Trail. Along the 184.5-mile corridor, visitors can see historic canal locks, lockhouses and aqueducts, with additional visitor centers spread from Georgetown to Cumberland (six in total). The Western Maryland Rail Trail and Capital Crescent Trail connect to sections of the towpath for a longer combined route.

The park is a linear corridor best reached by car to one of its many access points; Great Falls Tavern, the busiest entrance, is near Potomac, Maryland, roughly a 30-45 minute drive from downtown Washington, D.C. depending on traffic. The towpath itself can also be reached on foot or by bike from the Capital Crescent Trail and Western Maryland Rail Trail. No single regional airport serves the whole park given its 184.5-mile length; visitors typically fly into the Washington, D.C. area airports for the eastern end or drive to Cumberland for the western end.

Sources consulted did not give a single park-wide operating-hours figure; the towpath itself is generally accessible year-round as an outdoor trail. The Great Falls Tavern Visitor Center and mule-drawn boat rides run on their own seasonal schedule (boat rides April-October); confirm current hours for specific visitor centers on nps.gov/choh before visiting, since this was not fully detailed in the sources reviewed.

Per the National Park Service, the park is free to visit except at the Great Falls Tavern area near Potomac, Maryland, where fees apply: $20 per private vehicle, $15 per motorcycle, or $10 per person on foot or bicycle (ages 16+); an annual park pass is $35. Group and commercial rates also apply. The park does not accept cash at Great Falls entrance -- credit or debit only, per NPS.

A single stop at Great Falls Tavern with a short hike can take two to three hours, while through-hikers or cyclists tackling longer stretches of the 184.5-mile towpath often plan multi-day trips using the hiker-biker campsites.

Near Great Falls, the town of Potomac and the wider Rockville/Bethesda area in Montgomery County offer a range of hotel chains. Along the rest of the corridor, towns such as Hancock, Williamsport and Cumberland in western Maryland provide additional lodging for cyclists and hikers doing longer stretches of the towpath; the park itself also maintains basic hiker-biker campsites roughly every 5-7 miles for trail users.

Near Great Falls Tavern, the village of Potomac and nearby Bethesda/Rockville offer a range of casual and sit-down dining. Along the rest of the towpath, small canal towns such as Williamsport, Hancock and Cumberland provide more modest, local dining options geared toward cyclists and hikers passing through.

The Maryland side of Great Falls sits directly across the Potomac from Great Falls Park in Virginia, which offers its own overlooks of the same falls. The Western Maryland Rail Trail and Capital Crescent Trail both connect directly to the towpath for visitors wanting to extend a hike or ride. Washington, D.C.'s Georgetown neighborhood anchors the canal's eastern end.

For the eastern (Georgetown/Great Falls) end of the park, Washington, D.C.-area airports (Reagan National, Dulles, or BWI) are the nearest air gateways, with a car or rideshare needed to reach the towpath itself. For the western end near Cumberland, driving is the practical option, as the corridor has no dedicated transit line running its length.

The Potomac River's currents near Great Falls are notably dangerous, and swimming is strongly discouraged in that area; stay on marked trails and behind railings at overlooks. The towpath and river corridor are subject to periodic flooding, which can close trail sections without much notice, so check current conditions on the NPS website before a visit. For any emergency, dial 911.

Sturdy hiking or biking shoes, water, and sun protection are recommended for towpath and trail use. Cyclists tackling longer stretches should carry basic repair tools, since services are sparse between towns. A charged phone and a paper map or downloaded offline map are useful given patchy cell coverage in rural stretches of the corridor.

Because the Great Falls Tavern area does not accept cash, bring a credit or debit card for entrance fees. If you plan to ride or hike a long stretch of the towpath, plan overnight stops around the hiker-biker campsites, spaced every 5-7 miles, or the small canal towns along the route. Checking river and towpath conditions online before visiting is worthwhile given the corridor's flood history.

Dial 911 for any emergency. The park's general administrative phone number, per NPS, is 301-739-4200 (142 W. Potomac St., Williamsport, MD 21795).

Chesapeake & Ohio Canal National Historical Park (National Park Service) - https://www.nps.gov/choh/index.htm

This section is being updated and will be available shortly.

This section is being updated and will be available shortly.

This section is being updated and will be available shortly.