Georgetown/Washington Bethesda MD Potomac MD Great Falls MD Seneca MD Poolesville MD Dickerson MD Point of Rocks MD Brunswick MD Harpers Ferry WV Shepherdstown WV Sharpsburg MD Williamsport MD Downsville MD Big Pool MD Hancock MD Berkeley Springs WV Little Orleans MD Paw Paw WV Oldtown MD Cumberland MD Great Allegheny Passage C&O Canal Towpath C & O Canal Towpath Trail switch to GAP map
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C&O Canal / Great Allegheny Passage Guide: Maps, Services, Events, and More

About the C&O Canal Trail

The C&O Canal Towpath trail runs 185 miles along the Potomac River, from Washington DC to Cumberland Maryland.  These tools will help you plan your next cycling, hiking, running, or canoeing trip along the C&O Canal or the Great Allegheny Passage.

About the Great Allegheny Passage

The Great Allegheny Passage (GAP) trail runs 150 miles through the heart of Pennsylvania, from the Point Park in downtown Pittsburgh to Cumberland Maryland.  There it connects to the 185 mile long C&O Canal Trail. 

Together, the GAP and C&O add up to over 300 miles of blissful trail!  Both trails are included in this website's tools to help you plan your next adventure along the Great Allegheny Passage, the C&O, or both.
Click to Enlarge
Blue heron near Georgetown, by Mark Pankin
Blue heron near Georgetown Photo: Mark Pankin

C&O Canal Towpath and Great Allegheny Passage Resources

An interactive MAP of the C&O Canal Towpath & Great Allegheny Passage
BUSINESSES and SERVICES along the trails
An interactive TRIP PLANNER provides details specific to your trip
EVENTS on and around the C&O Towpath and GAP
Discuss the trails on the COMMENT FORUM
BED & BREAKFASTS along the trail
Journals and TRIP REPORTS from others' C&O / GAP travels
C&O and GAP MERCHANDISE - shirts and stickers
PHOTOS of the C&O and GAP
ELEVATION (altitude) of towns along the trails
WEATHER along the trails: [ GAP ] [ C&O ]
LINKS to other useful websites

C&O Canal Trail Conditions

C&O Trail conditions from the National Parks Service website:

Park Closure


- National Parks Service

If you are aware of any adverse trail conditions on the C&O, please let us know the specifics, or contact the National Parks Service.
We suggest that you also check the forum for any recent trail condition updates.

Great Allegheny Passage Trail Conditions

GAP Trail conditions from the Allegheny Trail Alliance website:

Trail Alerts

JUN 1 2017 | Current Alerts

The Paw Paw Tunnel of the C&O Canal (C&O mile 155) Scheduled to close the tunnel for 120-150 days. The tunnel will be impassable but allow for trail users to experience the inside of the North entrance of the tunnel. 

The project will involve assessing, removing or "scaling" loose and unstable rock, and then pinning solid rock to increase stability above the towpath.  During the project a portion of the towpath at the north or downstream end of the tunnel will be closed to all users. A less steep bypass trail will be signed directing thru-bikers and hikers to the top of Tunnel Hill then connecting with the existing trail. Hikers will be able to continue to use the entire Tunnel Hill Trail during the project. 

Once the closures goes into effect, visitors will still be able to walk into the first 300 feet of the tunnel from the south (parking lot side) entrance. The park anticipates the project to last 120 - 150 days with completion and full re-opening in late October 2017. Completion of this project may be impacted by weather conditions.

Check the C&O Canal NHP website for updates.  

 Img 1642  Img 1657

KEYSTONE/SANDCASTLE AREA (GAP mile 139) Friends of the Riverfront and the City of Pittsburgh are actively addressing a recent water accumulation issue adjacent to Keystone/Sandcastle along the Three Rivers Heritage Trail/ Great Allegheny Passage. The area may accumulate several inches of water during significant rain events. 

Check the Friends of the Riverfront's website for updates.

CONSTRUCTION ALERT AT (GAP mile 10) associated with the slide repair. Construction is underway and all bike traffic will need to exercise caution and walk their bike around the construction area (i.e. between the track rails). The area will be fenced off and barricades will be placed at the east and west ends of the site. Detour signs will be placed on the barricades indicating a right and left detour respectively. Construction equipment will be utilizing the trail from the Woodcock Hollow trailhead to the construction site. The heavy equipment will impact the trail and most likely kick larger stone onto the trail. All riders must be aware of the construction activity and use caution in this area. Construction is anticipated through mid-April. The grass shoulders and bike trail will be restored to equal or better condition at the conclusion of the project.

MAY 10 2017 | Repairs Close Olmsted Island Bridge and Overlook mile 14.1 on C&O Canal

by Pete Peterson 

Potomac, MD- The Chesapeake & Ohio Canal National Historical Park (C&O Canal) will temporarily close the Olmsted Island Trail and Great Falls Overlook on or about March 1, 2017 for repairs that will improve visitor safety and better protect park resources. Construction on the bridges is anticipated to last 90-120 days with completion and re-opening in late June 2017. Completion of construction may be impacted by weather conditions.

Read the official postingFor more information on the project and Great Falls, please visit their website HERE

 Great Falls Map   Olm2

Great Falls overlook 3: photo by Dave Adams

MAY 10 2017 | Several minor washouts - GAP trail between miles 4-11

It was reported from the Mountain Maryland trails group that several wash outs occurred due to recent rainfall.  Please use extra caution when traveling between mile 4 (Bone cave) up through mile 11.  Various pieces of the trail are affected and we want everyone going east and west to share the trail safely.  

We realize when avoiding potential hazards some riders swerve into oncoming trail traffic.  Be careful and travel safe!

Screen Shot 2017 05 10 At 12.36.26 Pm

APR 7 2017 | Water & Restroom Facilities

There are chemical toilets at the campgrounds and GAP access areas, but limited potable water, especially since the NPS is no longer treating the pump water at the hiker/biker campgrounds. Carry at least a quart of water more than you think you need. Take advantage of towns along the way for water resupply. 

MAR 21 2017 | Big Savage Tunnel (GAP mile 22)

The Big Savage Tunnel (GAP mile 22) is open for the 2017 trail season. Happy Trails!

The 3,300 ft. long Big Savage Tunnel (GAP mile 22,) near the Mason-Dixon Line, is lighted and is opened during trail season. The tunnel is generally closed for the winter from early December to early April - Please check this site for updates.

NOV 1 2016 | Ohiopyle State Park (GAP mile 63)

Updates and photos of the new Visitors Center are available on ‘Ohiopyle State Park’ Facebook page.

Additional Ohiopyle State Park information can be found on the PA-DCNR website.

NOV 1 2016 | Montour Trail (City of Pittsburgh to the Airport)

For complete details on all construction notices for the Montour Trail please Visit the Website

NOV 1 2016 | Three Rivers Heritage Section (GAP mile 139)

PITTSBURGH, PA: *To get answers to specific questions concerning the Three Rivers Heritage Trail detours, please join one of their Social Network sites: Visit the Website.

NOV 1 2016 | Brush (GAP mile 6) & Borden Tunnels (GAP mile 17.5), MD

The Brush Tunnel (GAP mile 6)  is lighted. 

The Borden Tunnel (GAP mile 17.5) is NOT lighted - For your safety, PLEASE DISMOUNT & WALK through this tunnel.

NOV 1 2016 | Scenic RR Excursions to Frostburg off track (GAP mile 10)

The Western Maryland Scenic RR Frostburg excursions are off track. The landslide, located on tracks between Frostburg and Switch No. 9, was discovered Thursday during a routine track inspection. The train will only go as far as Switch 9 until further notice. The Great Allegheny Passage trail is not impacted by this slide, this section is open for trail use.

SEP 20 2015 | Pinkerton Tunnel (GAP mile 52)

Pinkerton Tunnel - ridersPinkerton Tunnel is now open!

You still have the option to take a 1.5 mile detour around the restored Pinkerton tunnel, near mile 52 in Somerset County. Besides shortening the distance, fixing the tunnel has create another spectacular feature along the trail. Located between the Pinkerton Low and High Bridges, the "bridge-tunnel-bridge" in quick succession is a marvel. It's also make a great way to create a loop ride, using the tunnel and the detour trail. Thanks to all of the donors and supporters who made it happen! 

- Allegheny Trail Alliance

If you are aware of any adverse trail conditions on the GAP, please let us know the specifics, or contact the Allegheny Trail Alliance.
We suggest that you also check the forum for any recent trail condition updates.

Let us know if there's anything we can do to improve this website!

Proud Member Of:

C and O Canal Association
C&O Canal Association
Adventure Cycling Rails to Trails Conservancy

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