Overview
The Chesapeake and Ohio Canal National Historical Park stretches 184.5 miles along the north bank of the Potomac River, running from Georgetown in Washington, D.C., to Cumberland, Maryland. Built between 1828 and 1850, the canal was a major commercial artery carrying coal, grain, and other goods before the railroad era made it obsolete. It ceased operation after a catastrophic flood in 1924.
Today the park is managed by the National Park Service and draws hikers, cyclists, history enthusiasts, and nature lovers. The continuous flat towpath—once walked by mules pulling canal boats—is one of the longest unbroken recreational trails on the East Coast. The corridor also protects significant natural habitat along the Potomac, including wetlands, forests, and rocky outcroppings.
Note on the prompt: There is no U.S. state called "Iceland." The C&O Canal National Historical Park is located in Maryland (and its eastern terminus is in Washington, D.C.), not Iceland. This guide reflects the park's actual location. Verify all operational details on the official NPS website before your visit.
Before You Go
The park is free to enter along most of the towpath. Some fee areas and camping reservations may apply; check the official NPS site (nps.gov/choh) for current fee schedules and any permit requirements before you go.
Pack for variable weather. Spring brings mud and occasional flooding near the river; summer is humid and hot with high tick and mosquito activity; fall is generally the most comfortable season; winter is passable but some facilities close. Dress in layers and check trail conditions, especially after heavy rain, as sections of the towpath can flood.
- What to bring: Water (potable water is not available at all points), sun protection, insect repellent, a detailed trail map, and cash or a card for any fee areas.
- Dogs: Allowed on leash throughout the towpath.
- Bikes: Permitted on the towpath; no motorized vehicles.
- Cell service: Spotty in many rural sections between Harpers Ferry and Cumberland. Download offline maps before departing.
Getting There
By Car
The park has multiple access points along its length. The Georgetown terminus is accessible from Washington, D.C. Major access towns include Potomac and Rockville (MD), Harpers Ferry (WV, just across the river), Williamsport (MD), Hancock (MD), and Cumberland (MD). Parking is available at most major trailheads; verify availability locally as lots vary in size.
By Public Transit
The Georgetown/Great Falls end of the park is reachable by bus from Washington, D.C. The MARC Train (Maryland's commuter rail) stops in Brunswick and Martinsburg, giving access to the mid-section of the canal. Amtrak serves Cumberland, the western terminus. Check MARC and Amtrak schedules directly, as they are subject to change.
Nearest Airports
Reagan National (DCA), Dulles International (IAD), and Baltimore/Washington International (BWI) all provide reasonable access to the eastern sections of the park. Pittsburgh International (PIT) is an option for reaching the Cumberland western end.
Getting Around
The 184.5-mile towpath is the primary corridor through the park. It is nearly flat (a modest elevation gain from Georgetown to Cumberland), unpaved, and generally compacted gravel or packed dirt. Conditions vary by section and season.
- Cycling: The most efficient way to cover long distances. Many visitors do multi-day point-to-point rides, shuttling a car or using public transit at one end. Bike rentals are available in Georgetown and at some outfitters near Great Falls; verify availability locally.
- Hiking: Day hikes from any major trailhead are popular. The Billy Goat Trail near Great Falls is a well-known rocky scramble accessible from the towpath.
- Driving between sites: There is no road that runs the full length of the park. Drivers must use parallel state routes (primarily US-340 and MD-51) to hop between access points.
Where to Stay
Camping Along the Towpath
The NPS maintains a series of hiker-biker campsites roughly every 5–8 miles along the towpath. These are first-come, first-served and generally low-cost; check nps.gov/choh for current fees and any reservation requirements. Facilities are basic (pit toilets, water may or may not be available—verify per site).
Lockhouse Rentals
The C&O Canal Trust manages a program allowing visitors to rent restored historic lockhouses for overnight stays. These are a unique, historically immersive option. Availability is limited; book well in advance through the Trust's website.
Towns Along the Route
Cumberland, Hancock, Williamsport, Hagerstown, Brunswick, and Frederick (MD) all have hotels, motels, and bed-and-breakfasts in varying price ranges. Harpers Ferry, WV, just across the Potomac, also offers lodging. Verify current options and prices on standard booking platforms before travel.
Things to See & Do
Great Falls
One of the park's most dramatic features, Great Falls is a series of powerful cascades on the Potomac River accessible from the Maryland side (and the Virginia side via Great Falls Park, NPS). The overlook platforms offer striking views. The Billy Goat Trail (especially Trail A) is a challenging rocky scramble popular with day hikers.
Canal Locks and Lockhouses
Over 70 lift locks were built along the canal to raise and lower boats across the elevation change. Many are intact. Some historic lockhouses have been preserved and are available for overnight rental through the C&O Canal Trust—check their site for availability and pricing, as this is a distinctive lodging option.
Paw Paw Tunnel
Near the town of Paw Paw, WV (accessible from the Maryland side), this 3,118-foot hand-dug brick tunnel is an engineering feat of the 1800s. Bring a flashlight; the interior is unlit.
Wildlife and Birding
The Potomac corridor supports herons, osprey, bald eagles, wood ducks, and numerous songbirds. White-tailed deer are common. Copperhead snakes are present in rocky areas; watch where you step.
Canal Boat Demonstrations
At select visitor centers, particularly in Williamsport, the NPS has historically offered seasonal canal boat programs. Verify current programming on the NPS site, as schedules change.
Food & Drink
There are no restaurants or concession stands within the park itself along most of the towpath. Self-sufficiency is essential, especially on multi-day trips.
- Georgetown terminus: Abundant dining of all kinds within easy walking distance in Washington, D.C.
- Great Falls area: Limited options near the visitor center; the town of Potomac, MD, has restaurants a short drive away.
- Cumberland: A small city with a downtown dining scene; local diners and brew pubs are present—verify current businesses locally.
- Hagerstown: Larger city with a full range of dining options.
- Along the trail: Pack all food and water for sections away from towns. Potable water access is inconsistent; treat or filter river water if needed in an emergency.
Practical Information
Visitor Centers
The park has visitor centers at Georgetown (below the Key Bridge), Great Falls Tavern, Williamsport, Hancock, and Cumberland. Hours vary by season; check nps.gov/choh before visiting.
Emergency Contacts
In an emergency along the towpath, call 911. Cell service is unreliable in many rural sections. Let someone know your itinerary before multi-day trips.
Park Rangers
NPS rangers patrol the towpath and can assist with information and emergencies. The park's main information line is listed on the official NPS website.
Leave No Trace
Pack out all waste. Campfires are restricted to designated rings; check current fire regulations, especially during dry conditions. Stay on the towpath and established trails to protect the adjacent floodplain habitat.
Safety
Flooding: The Potomac River floods regularly, and sections of the towpath can become impassable after heavy rain. Check current conditions on the NPS site or with a ranger before setting out.
Wildlife: Copperhead snakes inhabit rocky areas, particularly around Great Falls and the Paw Paw area. Watch where you place your hands and feet. Tick checks after every outing are strongly recommended; Lyme disease is present in the region.
River swimming: The Potomac has powerful and unpredictable currents, particularly at and below Great Falls. Swimming is strongly discouraged and prohibited in some areas; people have drowned here. Treat the river with respect.
Heat: Summer humidity along the Potomac corridor can be intense. Start early, carry ample water, and recognize signs of heat exhaustion.
