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C & O Canal Towpath: Piedmont

C & O Canal Towpath: Piedmont, Frederick, Montgomery, Washington Counties, MD, 60.49 miles

Trail Facts

Length 60 mi
Elevation 33 to 253 ft
Grade 0.1% average
Shade cover 75%
Primary surface Dirt
Secondary surface Crushed gravel

Activities

E-biking · Biking · Walking · Running · Hiking · Birding · Kayaking · and more

About This Trail

The Piedmont segment is the first sixty miles of the Chesapeake and Ohio Canal towpath, running northwest from the tidewater locks in Georgetown to Harpers Ferry. It is the busiest and most urban stretch of the canal, with paved approaches near Washington giving way to hard-packed dirt beyond Great Falls. The towpath is rail-grade flat the whole way, climbing barely two hundred feet in sixty miles as it follows the Potomac past locks, lockhouses and eleven-arch aqueducts. Great Falls Tavern, the Monocacy Aqueduct and the trail towns of Point of Rocks and Brunswick break up the ride. Beyond Harpers Ferry the Antietam segment continues toward Hancock.

RailTrailWx TIPS

C & O Canal Towpath: Piedmont

Your comfort. Prognosticated.

  • Deep shade covers most of this segment, so the towpath runs cooler than the roads above it and dries slowly after rain.
  • The corridor runs east southeast to west northwest along the Potomac, so an east wind pushes you toward Harpers Ferry and a west wind meets you head on.
  • The river is never far away, so expect morning fog on the water.
  • The towpath near the Harpers Ferry footbridge is prone to washouts in moderate to high water, and the Byron Bridge stairway has been closed for work. Check the park's conditions page before counting on that crossing.
  • Well water at the hiker-biker campsites is not safe to drink untreated, and the park turns it off from mid November to mid April.
  • Section A of the Billy Goat Trail near Great Falls closes often when the river runs high, so have a fallback if you planned to walk it.
  • Only about two hundred feet of climb separate Georgetown from Harpers Ferry, so this is a segment where wind and mud matter far more than grade.

-Cory

Trivia

  • The Monocacy Aqueduct is the largest of the canal's eleven aqueducts, with seven arches each spanning 54 feet. Its stone is granite quarried at the base of nearby Sugarloaf Mountain.
  • Steel bands installed after Hurricane Agnes in 1972 held the Monocacy Aqueduct together until masons restored it in 2004 and 2005.
  • Great Falls Tavern began as a lockhouse and became a hotel for canal travelers in 1831.
  • At the Great Falls Overlook the Potomac drops more than sixty feet and runs on into Mather Gorge.
  • Boardwalks and bridges cross a floodplain terrace on Olmsted Island to reach the overlook.
  • President John Quincy Adams struck rocks and roots on his first attempts to turn the ceremonial first spadeful in 1828.
  • The habitats between sea level and the mountains rank the canal among the most biodiverse national parks.
  • The towpath's first bicycle surface was crushed blue stone laid over mud in 1958, from Georgetown to Widewater.

Climate

Excellent biking days per month, 2011-2025 climatology

In a typical year the C & O Canal Towpath: Piedmont has about 115 to 159 days of excellent weather for popular activities such as hiking, dog walking, e-biking, birding, running, biking, and walking, with April, October, and November the best months.

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Hourly comfort scores for the next 15 days of weather, tuned to your activity and your own thresholds.

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Enjoy the C & O Canal Towpath: Piedmont!

Peak Fall Color Climatology

Calendar of the typical peak fall color window along this trail

In half of past years, color along the C & O Canal Towpath: Piedmont peaks October 29 to November 7, typically around November 2. The trail has 34% deciduous coverage, with the majority being yellow-poplar, red maple, white oak, chestnut oak, and black oak.

History

George Washington founded the Potowmack Company in 1785 to make the Potomac navigable. It built five skirting canals around the worst falls, good for floating down but not for hauling up. Its holdings passed to the Chesapeake and Ohio Canal Company in 1824. President John Quincy Adams turned the first spadeful on July 4, 1828. The Baltimore and Ohio Railroad broke ground the same day, and the two fought in court over the narrow riverbank between Point of Rocks and Harpers Ferry before agreeing to share it. The canal reached Cumberland on October 10, 1850, and five boats brought down 491 tons of coal that first day. The railroad had beaten it there by eight years, so the canal stopped at Cumberland and never crossed the Alleghenies. Mules towed the boats, often driven by children, and seventy-four lift locks raised them 605 feet above tidewater. An 1889 flood forced the company into receivership, and the railroad came to control it through its bonds. The March 1924 flood ended navigation. The United States acquired the canal in 1938. Justice William O. Douglas walked the whole towpath in March 1954 to stop a proposed parkway, and Congress made it a National Historical Park on January 8, 1971. This segment carries the canal's first sixty miles, from the Georgetown tidewater locks past the Great Falls of the Potomac to Harpers Ferry. Steel bands held the Monocacy Aqueduct together from Hurricane Agnes in 1972 until masons restored it in 2005.

Trailheads

  • GeorgetownMILE 0Directions
  • Fletcher's CoveMILE 2.9Directions
  • Lock 5MILE 4.7Directions
  • Lock 6MILE 5.1Directions
  • Glen Echo: Lock 7MILE 6.7Directions
  • Seven LocksMILE 8Directions
  • CarderockMILE 10.2Directions
  • Angler's InnMILE 12Directions
  • Great Falls TavernMILE 14Directions
  • Swains LockMILE 16.3Directions
  • Pennyfield LockMILE 19.3Directions
  • Violettes LockMILE 21.8Directions
  • Seneca: Riley's LockMILE 22.5Directions
  • Sycamore LandingMILE 26.8Directions
  • Edwards FerryMILE 30.5Directions
  • Whites FerryMILE 35.5Directions
  • Woods LockMILE 39.3Directions
  • Monocacy AqueductMILE 41.9Directions
  • Nolands FerryMILE 44.4Directions
  • Point of RocksMILE 48.1Directions
  • BrunswickMILE 54.8Directions
  • Harpers FerryMILE 60.5Directions

Connects To

Capital Crescent Trail · Appalachian Trail · Potomac Heritage National Scenic Trail · Billy Goat Trail

Managed By

National Park Service, Chesapeake and Ohio Canal National Historical Park

Further Reading

  • National Park Service · Bicycling
  • National Park Service · Towpath Resurfacing Project
  • National Park Service · Chesapeake & Ohio Canal National Historical Park
  • National Park Service · Camping
  • National Park Service · Animals
  • National Park Service · Byron Bridge Stairway Replacement
  • National Park Service · The Chesapeake and Ohio Canal: The Kids Who Worked the Canal
  • Chesapeake and Ohio Canal Trust · Canal Groundbreaking
  • National Park Service · The Monocacy Aqueduct
  • National Park Service · Great Falls Tavern Visitor Center
  • National Park Service · Olmsted Island and Overlook Trail
  • National Park Service · Frequently Asked Questions
  • National Park Service · Canal Flood Information
  • Wikipedia · Chesapeake and Ohio Canal
  • Wikipedia · Chesapeake and Ohio Canal National Historical Park
  • National Park Service · Current Park Conditions

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