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Maryland | Washington County / Western Maryland

Potomac RiverBig Pool / Fort Frederick Campground to Williamsport River Bottom Park

A bounded Western Maryland Potomac moving-water reach from the Big Pool/Fort Frederick campground to the Williamsport River Bottom Park ramp. The Class I corridor has multiple C&O access options, hiker/biker camping, a mandatory Dam 5 portage, and downstream power-dam hazards that make the Williamsport endpoint a hard commitment.

Route location

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Plan this route

DistanceApproximately 16.7 river miles, American Whitewater Potomac reach 0.4
DifficultyModerate
Typical time6–10 hours depending on stage
ShuttleCar shuttle
The historic Town Creek Aqueduct crosses the C&O Canal corridor beside the Potomac River in Maryland.
Route photoC&O Canal and Potomac River corridor at Town CreekPhoto by Wikimedia Commons

Need to know

Why this call
This route is documented for planning, but does not receive a Paddle Today score.
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Route overview

Trip details

Access rules, camping, seasonal conditions and trip length.

Distance, difficulty, rules and camping
On-water distanceApproximately 16.7 river miles, American Whitewater Potomac reach 0.4Big Pool / Fort Frederick Campground to Williamsport River Bottom Park
DifficultymoderateThe source describes recreational moving water, but shallow rock, current, cold water, debris, and bridge or access hazards remain material.
ShuttleCar shuttleStage at Williamsport River Bottom Park after confirming the public ramp and parking, then shuttle to Big Pool Campground. If using an intermediate access, confirm it is open and legal; preserve daylight for the Dam 5 portage and the Williamsport take-out.
PermitsCheck posted rulesFollow current Maryland boating/PFD rules, NPS C&O Canal National Historical Park closures and ramp restrictions, Fort Frederick State Park campground and parking rules, Dam 5 and Williamsport dam warnings, and any local River Bottom Park restrictions. No route-specific paddling permit is claimed.
CampingOptions nearbyBig Pool Campground is the named put-in campground. American Whitewater also identifies North Mountain and Jordan Junction C&O hiker/biker campgrounds along the reach; confirm reservations, fees, capacity, closures, and whether vehicle staging rules permit the planned overnight logistics. No riverbank camping is included.
SeasonMar-NovSpring through fall is the practical planning season, but Maryland water levels, recent rain, temperature, debris, and daylight control every launch decision.

Plan ahead

Tomorrow and the weekend

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Plan

Plan your trip

Launch points, shuttle details, distance, and access notes.

Route logistics

Access and shuttle

A bounded Western Maryland Potomac moving-water reach from the Big Pool/Fort Frederick campground to the Williamsport River Bottom Park ramp. The Class I corridor has multiple C&O access options, hiker/biker camping, a mandatory Dam 5 portage, and downstream power-dam hazards that make the Williamsport endpoint a hard commitment.

Access map

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Start

Put-in

Big Pool Campground / Fort Frederick State Park Potomac access
Open mapDirections to put-in

The Big Pool coordinate is the American Whitewater route access anchor at the Fort Frederick park/campground area. The C&O/NPS and Maryland DNR public-access rules control current entry, parking, fees, hours, and carry conditions; do not occupy a campground site for vehicle staging without permission.

Finish

Take-out

Williamsport River Bottom Park / Potomac Park boat ramp
Open mapDirections to take-out

McCoy’s Ferry and Four Locks are useful documented intermediate access points, but access availability, road condition, parking, and shoreline carry must be reconfirmed before treating either as a bailout.

Road shuttle

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Access planner

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This changes launch and take-out logistics, not today's river score.

On-water distance16.7 miMixed access
On-water time6–10 hours depending on stageFull route option
ShuttleCar shuttleChoose a shorter in/out pair for a shorter day.

Big Pool Campground / Fort Frederick State Park Potomac access to Williamsport River Bottom Park / Potomac Park boat ramp is about 16.7 mi. Use the planner to compare shorter access pairs.

Access notes and hazards

Access caveats

  • The Big Pool coordinate is the American Whitewater route access anchor at the Fort Frederick park/campground area. The C&O/NPS and Maryland DNR public-access rules control current entry, parking, fees, hours, and carry conditions; do not occupy a campground site for vehicle staging without permission.
  • McCoy’s Ferry and Four Locks are useful documented intermediate access points, but access availability, road condition, parking, and shoreline carry must be reconfirmed before treating either as a bailout.
  • The Williamsport coordinate is the American Whitewater take-out anchor at the Conococheague confluence, corroborated by the C&O Canal Trust’s Riverbottom Park boat-ramp description. Confirm the current ramp and parking; do not substitute a private shoreline or an unrelated canal launch.
  • The Hancock station is a direct same-river gauge but is upstream of this reach. Local tributaries, rain, releases, debris, dam hydraulics, and wind can differ materially from the instantaneous station reading.

Watch for

  • USGS 01613000 stage, discharge, and trend
  • 2.22 ft low-runnable planning context, recent rain, fast rise, cold water, wind, floating wood, strainers, and bridge hydraulics
  • Dam 5 mandatory portage, Williamsport power-company dam, C&O/NPS closures, campground staging rules, intermediate access, and River Bottom Park parking/ramp status

Plan this paddle

Choose your trip times

No account needed. Check the selected access points above, then choose both dates and times. For an overnight paddle, set take-out to the following date.

Trip schedule

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Conditions

Water levels, gauge history, and hourly forecast

Check the forecast and local water levels before launching.

Gauge detail

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Gauge

Recent trend

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Weather

Hourly forecast

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Route gallery

Photos

Check each caption: some photos show the surrounding area rather than this exact trip.

The historic Town Creek Aqueduct crosses the C&O Canal corridor beside the Potomac River in Maryland.
C&O Canal and Potomac River corridor at Town CreekPhoto by Wikimedia Commons
Wikimedia Commons: public domain

Sources

Data and sources

Read the access and hazard notes and check the linked guides. We do not issue a daily score for this trip.

NotesWhat to know before you go

These notes cover the access details, route quirks, and source caveats most likely to matter once you get there.

  • Named moving-water corridorBig Pool/Fort Frederick Campground to Williamsport, 16.7 miles, Class I

    American Whitewater names the reach, exact route endpoints, intermediate C&O accesses, hiker/biker camping, Dam 5 portage, Hancock gauge, and the route-specific low-runnable flow correlation.

    Source

  • Federal public access and hazardsC&O/NPS Potomac access; Dam 5 and Williamsport power-company dam warnings

    NPS identifies the park’s Potomac ramps, required PFDs, Dam 5, and the Williamsport power-company dam as material boating hazards.

    Source

  • Williamsport endpointRiver Bottom Park boat ramp at the Potomac/Conococheague confluence

    The C&O Canal Trust documents the Riverbottom Park Potomac boat ramp and the C&O access inventory lists the Williamsport Boat Ramp.

    Source

  • Direct flow evidenceUSGS 01613000 Potomac River at Hancock; American Whitewater 2.22 ft low-runnable context

    USGS supplies live direct same-river stage/discharge context; American Whitewater supplies the route-specific planning screen and the station correlation.

    Source

  • Camping postureBig Pool Campground plus North Mountain and Jordan Junction hiker/biker sites

    American Whitewater identifies the endpoint and along-route camping sequence; confirm current NPS and state-park status separately.

    Source

  • Live gaugeUSGS 01613000, Potomac River at Hancock, MD

    This is a direct same-river station. Readings are provisional and must be combined with trend and visual conditions.

    Source

  • Approved route imageryRights-cleared public-agency or public-domain corridor image

    Wikimedia Commons public-domain C&O/Potomac corridor image used as route context; it does not certify current flow, dam, portage, campground, or ramp conditions.

    Source

Verify it yourselfCheck the source links

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Reports

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Keep exploring

More routes to check next

Compare another stretch on this river, or explore different rivers within 75 straight-line miles.

More in Maryland

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Maryland route guideBrowse every tracked Maryland route.Washington County / Western MarylandJump to routes in this region.

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Nearby routes within 75 miles

Conococheague CreekKemps Mill Park to Williamsport River Bottom Park · about 11 straight-line mi awayEasy · Approximately 4.5 miles from Kemps Mill Park to Williamsport River Bottom ParkAntietam CreekDevil’s Backbone Park to MD 34 / Porterstown Bridge · about 17 straight-line mi awayModerate · Approximately 7.9 Antietam Creek miles from Devil’s Backbone Park to MD 34Antietam CreekMD 34 / Porterstown Bridge to Antietam Creek C&O Campground and Potomac confluence · about 18 straight-line mi awayModerate · Approximately 5.8 river miles, American Whitewater Lower Antietam/Burnside Bridge SectionCacapon RiverFishers Ford Bridge public access to Cacapon Power Plant public access · about 19 straight-line mi awayEasy · 8.5 mi

Quick answers

Potomac River paddling FAQ

What water level is best for the Big Pool / Fort Frederick Campground to Williamsport River Bottom Park route on the Potomac River?

This planning route has no live Paddle Today score. Review the linked water-level sources, current access notices and route-specific hazards before travel.

Where does the Big Pool / Fort Frederick Campground to Williamsport River Bottom Park route on the Potomac River start and end?

This route starts at Big Pool Campground / Fort Frederick State Park Potomac access and ends at Williamsport River Bottom Park / Potomac Park boat ramp, Approximately 16.7 river miles, American Whitewater Potomac reach 0.4 on the water.

Is the Big Pool / Fort Frederick Campground to Williamsport River Bottom Park route on the Potomac River suitable for beginners?

This is listed as a moderate route. Review the difficulty notes, hazards and current access conditions against your group's skills. No live score assesses this trip.

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