Swains Lock Hiker/Biker Campsite

For Maryland residents and outdoor enthusiasts traveling through the Potomac region, Swains Lock Hiker/Biker Campsite offers a unique and tranquil retreat nestled within the Chesapeake and Ohio Canal National Historical Park. Known officially as Mile 16.6 on the C&O Canal towpath, this campsite serves as a vital resting spot for those traversing the historic 184.5-mile trail. The site is situated near the historic Lock 21, often referred to as Swains Lock, where the rich heritage of Maryland’s canal era meets the natural beauty of the Potomac River. Unlike traditional developed campgrounds, Swains Lock provides a primitive, "back-to-nature" experience that appeals to those looking to escape the bustle of suburban life without leaving Montgomery County.

The atmosphere at Swains Lock is defined by its proximity to the water and the gentle sounds of nature. Campers often remark on the soothing white noise provided by the nearby river and small waterfalls, which creates a peaceful environment for an overnight stay. As a dedicated hiker-biker site, it maintains a community spirit among travelers, where cyclists heading from Pittsburgh to D.C. share space with local hikers exploring the Billy Goat Trail or the Great Falls area. The environment is rustic and scenic, offering stunning sunset views over the Potomac and a quiet canopy of trees that provides ample shade during the warm Maryland summer months.

Location and accessibility are key features of this destination. Located in Potomac, MD 20854, the campsite is easily reached by following River Road to Swains Lock Road. For those arriving by vehicle, there is a dedicated on-site parking lot that offers free parking, though visitors should note that the actual camping area is located approximately 0.4 miles down the towpath from the lot. This short walk ensures that the camping sites remains quiet and separated from the main road. The entrance and parking area are wheelchair accessible, making the day-use picnic areas reachable for all visitors. However, because the site is located directly on the towpath, motorized vehicles are strictly prohibited beyond the parking area, preserving the trail for its intended hikers and bikers.

Services offered at Swains Lock Hiker/Biker Campsite are primitive by design, focusing on the essential needs of self-sufficient travelers. The National Park Service maintains this as a "trash-free" park, meaning all visitors must practice "Pack In, Pack Out" principles to keep the riverbanks pristine. While the amenities are basic, they provide the necessary infrastructure for a comfortable one-night stay along the trail. The management ensures that the grounds are kept clear and that basic facilities are functional for the rotating flow of daily visitors. It is important to note that while water is available, it is often treated with iodine or considered non-potable depending on the season, so bringing a filtration system or your own supply is highly recommended.

• Five designated primitive tent sites available on a first-come, first-served basis.
• Potable water available via a hand pump (seasonal, typically mid-April through mid-November).
• Public chemical toilets (port-a-potties) located conveniently near the lock and trail.
• Individual picnic tables at each site for meal preparation and relaxation.
• On-site barbecue grills and fire rings for controlled campfire cooking.
• Free on-site parking for day users and those staging their gear for the walk-in sites.
• Pet-friendly policies that allow leashed dogs to join their owners on the trail and at the campsite.

Features and highlights of the Swains Lock area extend beyond the campsite itself, making it a multifaceted recreational hub. The site is a favorite for those who enjoy "kid-friendly hikes," as the flat towpath allows children to explore the historical locks and local wildlife with ease. Birdwatchers frequently visit the area to spot bald eagles and ospreys that hunt along the Potomac. For those interested in history, the Lockhouse 21 is a major highlight; it has been beautifully rehabilitated and is part of the Canal Quarters program, offering a glimpse into the life of a lock tender in the 19th century. The site's location also makes it an excellent "last stop" for bikepackers finishing their journey toward Georgetown.

• Stunning riverside views perfect for photography and sunset watching.
• Direct access to miles of hiking and biking trails along the C&O Canal towpath.
• Excellent opportunities for bank fishing along the Potomac River and the canal.
• A historic red sandstone lock (Lock 21) that showcases Maryland’s industrial history.
• Spacious, flat campsites that accommodate both traditional tents and hammock setups.
• Proximity to Great Falls, located just a few miles downstream for a more vigorous day trip.
• Shaded picnic areas with tables, making it a popular spot for local families to enjoy weekend lunches.

Address: Swains Lock Rd, Potomac, MD 20854, USA

Phone: (301) 739-4200

What is worth choosing about Swains Lock Hiker/Biker Campsite is its unmatched accessibility for a "wilderness" experience so close to Washington, D.C. For many Marylanders, it is the perfect introduction to bikepacking or primitive camping because it feels remote while remaining within a short drive of home. The lack of a camping fee or reservation requirement makes it a flexible option for spontaneous adventures—just show up, find an open site, and enjoy the river. It is particularly worth choosing if you value a peaceful night's sleep accompanied by the sound of a nearby waterfall, a feature that many reviewers cite as a highlight of their stay.

Furthermore, the site is an excellent choice for those who appreciate history as much as nature. Standing at the lock and imagining the canal boats passing through 150 years ago adds a layer of depth to the camping experience that modern RV parks simply cannot replicate. While the walk from the parking lot requires hauling gear about 0.4 miles, this small effort pays off in the form of a quieter, more secluded campsite where you are truly immersed in the Potomac’s riverine environment. Whether you are a local family looking for a kid-friendly nature walk or a dedicated cyclist on a cross-state journey, Swains Lock provides a reliable, beautiful, and authentic Maryland outdoor experience.

Ultimately, Swains Lock Hiker/Biker Campsite remains a cherished part of the C&O Canal’s legacy. By offering a free and accessible space for people to connect with the Potomac River, it encourages the preservation of Maryland’s natural and historical landscapes. Choosing to spend a night here means joining a long line of travelers who have found rest and inspiration along the banks of this historic waterway. Would you like me to find more information on nearby trails or help you plan a full itinerary along the C&O Canal?