Designation: National Historical Park
Location: District of Columbia, Maryland, West Virginia
Preserving America's early transportation history, the C&O Canal began as a dream of passage to Western wealth. Operating for nearly 100 years the canal was a lifeline for communities along the Potomac River as coal, lumber, and agricultural products floated down the waterway to market. Today it endures as a pathway for discovering historical, natural, and recreational treasures.
The Washington, DC, area has a four-season Mid-Atlantic climate. Summertime is warm and humid, while winter can be cold and snowy. Precipitation averages 2-4â monthly, year-round. The climate gradually gets cooler and wetter further west along the canal where the elevation is higher.
The park has numerous access points. There is no main entrance. In Washington, DC, the C&O Canal begins in Georgetown on 29th Street NW, south of M Street, and runs alongside Canal Road / Clara Barton Parkway out of DC to the west. The entrance to Great Falls is at Canal Road and MacArthur Blvd in Potomac, MD. Park Headquarters and the Williamsport Visitor Center are located off I-81 at exit 2. Cumberland Visitor Center is off I-68 at exit 43C. See the maps page for more.
The area of Great Falls is one of the reasons for the C&O Canal needed to be built for boat traffic.
Credit: NPS photo
One of seven Park visitor centers, the Bowles House sits along an empty canal bed in Hancock.
Credit: NPS photo
Big Slackwater is a 3 mile stretch where canal boats entered the Potomac River to travel above Dam 4.
Credit: NPS photo
Mule-drawn canal boat rides are offered at Great Falls Tavern, April through October.
Credit: NPS photo/Buckner
Friday, Jul 17
Sunny
High: 97.7°F | Low: 71.4°F
Humidity: 49%
Wind: 6.3 mph
Rain Chance: 1%
UV Index: 3.1
Sunrise: 05:57 AM
Sunset: 08:33 PM
Moon: Waxing Crescent (15%)
Visibility: 6 mi
Dew Point: 73.9°F
Cloud Cover: 1%
Pressure: N/A mb
Air Quality (PM2.5): N/A
Ozone: N/A
EPA Index: N/A
Saturday, Jul 18
Partly Cloudy
High: 91.4°F | Low: 69.3°F
Humidity: 77%
Wind: 13.2 mph
Rain Chance: 76%
UV Index: 5.4
Sunrise: 05:58 AM
Sunset: 08:32 PM
Moon: Waxing Crescent (23%)
Visibility: 5 mi
Dew Point: 74°F
Cloud Cover: 76%
Pressure: N/A mb
Air Quality (PM2.5): N/A
Ozone: N/A
EPA Index: N/A
Sunday, Jul 19
Sunny
High: 86.6°F | Low: 69.2°F
Humidity: 68%
Wind: 9.6 mph
Rain Chance: 57%
UV Index: 7
Sunrise: 05:58 AM
Sunset: 08:31 PM
Moon: First Quarter (33%)
Visibility: 5 mi
Dew Point: 71°F
Cloud Cover: 57%
Pressure: N/A mb
Air Quality (PM2.5): N/A
Ozone: N/A
EPA Index: N/A
Air Quality Alert issued July 17 at 9:45AM EDT by NWS Baltimore MD/Washington DC
Effective: Jul 17, 2026 9:45am
Expires: Jul 18, 2026 12:00am
The Virginia Department of Environmental Quality has issued a
Code PURPLE Air Quality Alert Friday for
Northern Virginia.
A Code Purple Air Quality Alert means that air pollution
concentrations within the region are very unhealthy for the
general population. The risk of health effects is increased
for everyone. The effects of air pollution can be minimized by
avoiding strenuous activity or exercise outdoors.
For more information on ground-level ozone and fine particles
visit the web site Virginia DEQ air quality web site at
www.deq.virginia.gov
Air Quality Alert issued July 17 at 8:30AM EDT by NWS Baltimore MD/Washington DC
Effective: Jul 17, 2026 8:30am
Expires: Jul 18, 2026 12:00am
The Virginia Department of Environmental Quality has issued a
Code RED Air Quality Alert Friday for
Northern Virginia.
A Code Red Air Quality Alert means that air pollution
concentrations within the region are unhealthy for the general
population. The effects of air pollution can be minimized by
avoiding strenuous activity or exercise outdoors.
For more information on ground-level ozone and fine particles
visit the web site Virginia DEQ air quality web site at
www.deq.virginia.gov
Air Quality Alert issued July 16 at 5:10PM EDT by NWS Baltimore MD/Washington DC
Effective: Jul 16, 2026 5:10pm
Expires: Jul 18, 2026 12:00am
The Virginia Department of Environmental Quality has issued a
Code RED Air Quality Alert Friday for Northern Virginia.
A Code Red Air Quality Alert means that air pollution
concentrations within the region are unhealthy for the general
population. The effects of air pollution can be minimized by
avoiding strenuous activity or exercise outdoors.
For more information on ground-level ozone and fine particles
visit the web site Virginia DEQ air quality web site at
www.deq.virginia.gov
Air Quality Alert issued July 16 at 4:40PM EDT by NWS Baltimore MD/Washington DC
Effective: Jul 16, 2026 4:40pm
Expires: Jul 18, 2026 12:00am
The Virginia Department of Environmental Quality has issued a
Code RED Air Quality Alert Friday for Northern Virginia.
A Code Red Air Quality Alert means that air pollution
concentrations within the region are unhealthy for the general
population. The effects of air pollution can be minimized by
avoiding strenuous activity or exercise outdoors.
For more information on ground-level ozone and fine particles
visit the web site Virginia DEQ air quality web site at
www.deq.virginia.gov
Date: Jan 17, 2026 12:00am to Jan 17, 2026 12:00am
Paid Event
Have you heard about the Civilian Conservation Corps (CCC)? Come visit the Discovery Space at Great Falls Tavern Visitor Center and learn about the New Deal Era initiative that helped improve our public lands. Discover the story of the two camps of African American CCC enrollees that helped make the canal the great place it is today. Explore the different projects these two camps completed on the canal and test your own building skills!
Date: Feb 5, 2026 12:00am to Feb 5, 2026 12:00am
Paid Event
In March 1954, William O. Douglas and 57 others hiked down the Chesapeake and Ohio Canal towpath to draw attention to the natural beauty and wonders of the ecosystems and history of the canal.âŻÂ In honor of the 72ndâŻanniversary of this hike, come visit the Discovery Space and learn about people who have spoken up to help preserve places like the canal!⯠Speak up and share your special places! And investigate how NPS preserves and conserves unique places across the nation.Â
Date: Mar 1, 2026 12:00am to Mar 31, 2026 12:00am
Paid Event
Explore the life of a lockkeeper and family in the 1870's time period with a guided tour of one of the C&O Canal's original lockhouses. Girl Scouts offer free tours of the lockhouse and grounds at Lock 24. In addition, there may be various Victorian Era demonstrations such as laundry, cider pressing, making lemonade, churning butter or ice cream and more. Visitors are welcome to participate in the activities and taste the results.Â
Open every Saturday and Sunday 1pm-4pm, March 21st through July 12th and August 16th through December 12th. The lockhouse will be closed for bad weather.Â
Location: Rileys Lockhouse Rileys Lock Rd Poolesville, MD 20837
Date: Mar 21, 2026 12:00am to Jul 12, 2026 12:00am
Paid Event
The C&O canal is a trash free park! Visitors wonât find any trash cans at the park and should plan on carrying any trash out with them when they go. As spring arrives, the weather warms and visitation increases from people and plants alike, swing by the Discovery Space at Great Falls Tavern for some hands-on activities and explore why the âpack-in, pack-out" model and âLeave No Traceâ are important to maintaining our natural spaces!Â
Date: Apr 1, 2026 12:00am to Apr 30, 2026 12:00am
Paid Event
Built in 1801 by Abner Cloud, Jr., the house is considered one of the finest examples of Federal architecture in Washington D.C. Pre-dating the construction of the C&O Canal, the home of Abner Cloud served as the center of the family farm and fishing business.  Tour the Abner Cloud House and learn more about early 19th century farming, architecture, and the people who lived and worked on the property.Â
The three-story, stone home is operated in parntership with The Colonial Dames of America and is open for tours on the first Sunday of each month from 12:00 pm - 5:00 pm. The Abner Cloud House is located at Fletchers Cove. Admission to Fletchers Cove and the Abner Cloud House is free.
Date: Apr 12, 2026 12:00am to Apr 12, 2026 12:00am
Paid Event
Date: Apr 12, 2026 12:00am to Apr 26, 2026 12:00am
Paid Event
Join NPS lead hike on River Trail from 1:00 - 2:00 PM to learn about native plants and conservation at C&O Canal NHP. This is an easy, 1 mile trail that hosts native plants such as woodland phlox, golden ragwort, paw paw trees, violets, and trillium.
The River Trail is near the Great Falls Tavern in Potomac, MD.
Location: Great Falls Tavern 11710 MacArthur Blvd. Potomac, MD 20854
Date: Apr 22, 2026 12:00am to Apr 22, 2026 12:00am
Paid Event
Join us to examine the remaining evidence of a small community serving an important transportation crossroads in the 1800âs. Bridgeport â a Canal lock and lockhouse, tavern and inn, stores, residences, and outbuildings for animals and storage â grew up at the intersection of the C&O Canal at Lock 38 and the Sharpsburg-Shepherdstown Pike. Here a mixture of people worked to serve the travelers and exchange news of the region. Learn about the role of the Ferry Hill Plantation in the formation and working of the Bridgeport hamlet.
Due to limited parking at Lock 38, participants are encouraged to arrive early and drive about Âź mile east on Canal Road (toward Antietam Creek Campground) to a larger parking area and walk back to Bridgeport/Lock 38. (Mile Marker 72.79)
Date: Apr 25, 2026 12:00am to Apr 25, 2026 12:00am
Paid Event
Join us at the Great Falls Tavern Visitor Center for a ranger program and learn more about the history of the C&O Canal! A ranger will present a program with accompanying hands-on learning activities on topics including 19th-century fashion, the history of National Park Service rangers, period music, and more!Â
Date: Apr 26, 2026 12:00am to Apr 26, 2026 12:00am
Paid Event
đ Physical Address:
142 W. Potomac St.
Williamsport, MD 21795
đ¤ Mailing Address:
142 W. Potomac St.
Williamsport, MD 21795
đ Voice Phone: 301-739-4200
âď¸ Email: CHOH_Information@nps.gov