4 Mile Campsite
Knoxville, Maryland
Campground in Maryland.
Photos shown are stock images and may not represent the actual campground.
Mile 26.1 - Hiker-biker campgrounds are located along the towpath approximately every 5-7 miles. No fee or reservation required. Overnight stays are limited to one night. All sites include a chemical toilet, picnic table, grill, and drinking water. Please Note: Potable water may not be available at each campsite. Water is treated with iodine. Please plan to have water purification tablets with you. Water is turned off from November 15 to April 15 each year.
Rating
Reviews
Great Falls is popular during peak season. Reserve 2-4 weeks in advance for weekends and holidays.
Most parks have check-in after 1:00 PM and check-out by 11:00 AM. Call ahead if you'll arrive late.
Maryland weather can change quickly. Pack layers and check the forecast for Great Falls.
Don't miss local attractions near Great Falls. Ask the camp host for hidden gems and trails.
Mar 18, 2026
Better than Chisel Branch or Swain's lock for backpackers. The main reason I say this is because there aren't any buildings across from it at night and it's usually unoccupied since you have to hike in.
Mar 18, 2026
Great spot. Right off the trail. Very close to the 26 mile marker. Porta pottie was right there and easy. Water easy to get to in the river. Plenty of scrap wood for fire. Picnic table good. Only one picnic table and one fire pit though.
Mar 18, 2026
nice spot for bike camping. neat animal sounds and i think fish jumping in the river. has a maintained portapotty heads up: they no longer iodine treat the water pumps
Mar 18, 2026
Beautiful campsite on Potomac and C&O Canal Tow Path. Shady but plenty of cleared space. Fire circle, water pump, grill, recently serviced out house, amazing view of river. Very quiet and tranquil. Right on tow path.
Mar 18, 2026
Thank God we're back on track with regular porta potty maintenance. Last year was baaaad. Pump water is only slightly rusty tasting. Lots of plane traffic going into Dulles. Can slightly hear music from the water park across the river. Saw a bald eagle nesting in the area and flying by often. Otherwise isolated from nearby stuff and pretty quite.
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