Current Park Conditions


Park Closure


Towpath and Park Conditions

Milepost 1–25

Including Georgetown, Washington D.C.; Bethesda, MD; Potomac, MD; Seneca, MD

  • Georgetown Locks 3 & 4 (MP 2)

    Towpath Closed, Towpath detour around the Lock 3 plaza located between 30th Street and Thomas Jefferson Street in Georgetown. Lock 3 plaza and surrounding area will be closed for the reconstruction and repairs of Locks 3 and 4. For more information
  • Rock Run (MM 8.8)

    Towpath Closed, Find a detour over bridges at Lock 10 and 11, and a temporary bypass trail for a total distance of approximately 0.2 miles between mileposts 8.8 to 9.0.

  • Billy Goat Trail (MM 9.9)

    Open, Section A
    Closed, Section B
    Open, Section C
  • Great Falls Tavern Area (MP 14)

  • Closed, River Trail
  • Towpath Closed, Construction for the Lock 5-22 Project is ongoing throughout the Great Falls area. Please use the marked towpath detour at Great Falls upstream of Lock 20 to get around the construction site. For more information.
  • Closed, Mule-drawn boat rides. Boat rides will resume in 2019 when the Lock 5-22 project is completed. For more.
  • Open, Olmsted Island and Olmsted Trail out to the Great Falls Overlook.
  • Closed. Construction will be ongoing at Swain's Lock (Lock 21). A majority of the parking lot will be closed through July 2018.

Milepost 25–50

Including Poolesville, MD; Whites Ferry, MD; Dickerson, MD; Point of Rocks, MD

Milepost 50–100

Including Brunswick, MD; Harpers Ferry, WV; Shepherdstown, WV; Downsville, MD; Williamsport, MD
  • Catoctin Aqueduct- Brunswick Family Campground (MP 51.5- MP 54)

    Towpath Closed. Due to a washout at Culvert 82, the towpath is closed in this section. There is no detour in place at this time due to unsafe conditions on adjacent roadways. From the west, exit the towpath at Brunswick (MP 55), or from the east at Lander Lock 29 (MP 50.9). Please contact Shepherdstown Pedal and Paddle at 304-876-3000 or River and Trail Outfitters at 301-834-9950 to arrange for a shuttle around the detour.

  • Williamsport Area (MP 100)

    • Closed, Conococheague Aqueduct towpath access, find a marked towpath detour upstream and downstream. Please follow the marked detour route. For more information.
  • Closed, Boat rides not operating. Call 301-582-0813 for more info.

Milepost 100–150

Including Big Pool, MD; Hancock, MD; Little Orleans, MD

Milepost 150–184.5

Including Paw Paw, WV; Oldtown, MD; Cumberland, MD
  • Paw Paw Tunnel (MP 155.2)

    Open. Construction for phase 2 of the scaling project expected to begin the last week of August 2018. For more information

Drinking Water Conditions

Updated August 2, 2018

Drinking water is available from mid-April to mid-November at Hiker/Biker and Drive-In Campsite locations, approximately every 5 to 7 miles. Water quality tests are performed frequently by park staff ensuring drinkable water.

On Swains Campground (MM 16.7)
On Seneca Creek/Rileys (MM 22)
On Horsepen Branch Campsite (MM 26)
On Chisel Branch Campsite (MM 30.5)
On Turtle Run Campsite (MM 34.4)
On Marble Quarrry Campsite (MM 38.2)
On Indian Flats (MM 42.4)
On Calico Rocks Campsite (MM 47.7)
On Bald Eagle Island Campsite (MM 50.3)
Off Lock 34 (MM 61.5)
Off Huckleberry Hill Campsite (MM 62.9)
On Antietam Creek Campground (MM 69.6)
On Killiansburg Cave Campsite (MM 75.4)
On Horseshoe Bend Campsite (MM 79.7)
On Big Woods Campsite (MM 82.4)
On Opequon Junction Campsite (MM 90.8)
On Cumberland Valley Campsite (MM 95.2)
On Jordan Junction Campsite (MM 101.2)
On Four Locks Picnic Area (MM 108.9)
On North Mountain Campsite (MM 109.2)
Off McCoys Ferry (MM 110)
On Licking Creek Campsite (MM 116)
On Little Pool Campsite (MM 120.7)
On White Rock Campsite (MM 126.5)
Off Leopards Mill (MM 129.9)
Off Cacapon Junction (MM 133.6)
On Indigo Neck (MM 139)
On Fifteen Mile Creek Campground (MM 140.9)
On Devils Alley (MM 144.5)
On Stickpile Hill Campsite (MM 149.3)
On Sorrel Ridge Campsite (MM 154.1)
Off Arbaugh (MM 155)
On Paw Paw (MM 156)
Off Purslane Run Campsite (MM 157.4)
On Town Creek (MM 162)
On Potomac Forks (MM 165)
On Pigmans Ferry (MM 169)
On Spring Gap (MM 173)
On Irons Mountain Campsite (MM 175.4)
On Evitts Creek Campsite (MM 180)


River Conditions

Raging Potomac River above flood stage.
Raging Potomac River well above flood stage at Great Falls, Fall 2011

NPS Photo

The Park monitors Potomac River levels to determine when portions of the towpath, hiking trails or parking areas might be affected by rising river levels. By visiting the National Oceanic and Atmospheric Administration - National Weather Service Advanced Hydrologic Prediction Service, you can see a timeline of expected river rises and crests to help plan your visit to the park.

Section A of the Billy Goat Trail often closes due to flooding. Under normal conditions, the trail is closed when the gauge at Little Falls reaches 5 feet and reopens when the gauge falls to 4.8 feet. However, under certain circumstances, the trail may be closed at lower levels. Please call the Great Falls Tavern Visitors Center at 301-767-3714 during regular business hours for the latest information on trail closures.


Last updated: August 14, 2018

Contact the Park

Mailing Address:

1850 Dual Highway, Suite 100
Hagerstown, MD 21740


(301) 739-4200

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