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See all 3 routes on Monocacy River

Maryland | Frederick County / Central Maryland

Monocacy RiverGambrill Mill at Monocacy National Battlefield to Monocacy Boat Ramp / Dickerson

The lower section of Maryland’s official Monocacy Scenic Water Trail from Gambrill Mill to the Monocacy Boat Ramp near the Potomac confluence. The route stays above the downstream Potomac decision boundary and should not be extended into a separate Potomac trip without a new plan.

Route location

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Plan this route

DistanceApproximately 17.6 river miles, official Monocacy Scenic Water Trail Section 3
DifficultyEasy
Typical time5–9 hours depending on stage
ShuttleCar shuttle
Two paddlers move downstream on the Monocacy River beneath wooded banks in Maryland.
Route photoMonocacy River Water Trail paddling contextPhoto by Saki / National Park Service

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 17.6 river miles, official Monocacy Scenic Water Trail Section 3Gambrill Mill at Monocacy National Battlefield to Monocacy Boat Ramp / Dickerson
DifficultyeasyThe source describes recreational moving water, but shallow rock, current, cold water, debris, and bridge or access hazards remain material.
ShuttleCar shuttleStage at the Monocacy Boat Ramp near the aqueduct, then use the battlefield access road to Gambrill Mill. Verify NPS parking, road, and visitor-use conditions and plan for the longest of the three official sections.
PermitsNone notedNo route-specific paddling permit is identified by the water-trail sources. Follow current Maryland boating/PFD rules, park hours, hunting notices, parking instructions, and posted access restrictions.
CampingDay tripNo on-route camping is claimed. The Monocacy Boat Ramp and battlefield access are day-use contexts; use a separately confirmed campground or lodging basecamp.
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

Forecasts can change. Check current conditions again before leaving.

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Plan

Plan your trip

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

Route logistics

Access and shuttle

The lower section of Maryland’s official Monocacy Scenic Water Trail from Gambrill Mill to the Monocacy Boat Ramp near the Potomac confluence. The route stays above the downstream Potomac decision boundary and should not be extended into a separate Potomac trip without a new plan.

Access map

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Start

Put-in

Gambrill Mill Tour Stop 4 public access
Open mapDirections to put-in

The county map and NPS guide describe a mix of paved ramps, gravel beaches, carries, and unimproved access; confirm the current launch surface, parking, hours, and waterline before unloading.

Finish

Take-out

Monocacy Boat Ramp at the Potomac confluence
Open mapDirections to take-out

The route is divided into official sections, but the river can be run shorter with intermediate public sites. A missed take-out can create a long, unsafe extension, so carry a map and leave daylight margin.

Road shuttle

Driving shuttle routeShuttle in Apple MapsOpenStreetMap
Access notes and hazards

Access caveats

  • The county map and NPS guide describe a mix of paved ramps, gravel beaches, carries, and unimproved access; confirm the current launch surface, parking, hours, and waterline before unloading.
  • The route is divided into official sections, but the river can be run shorter with intermediate public sites. A missed take-out can create a long, unsafe extension, so carry a map and leave daylight margin.

Watch for

  • USGS 01643000 stage and trend
  • recent rain, fast rise, cold water, shallow rock, floating wood, strainers, bridge hydraulics, and hunting activity
  • muddy or slippery launch areas, park hours, parking capacity, and a hard take-out at the named endpoint
  • Potomac confluence current, wind, water-quality advisories, and the hard Monocacy take-out boundary

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

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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.

Two paddlers move downstream on the Monocacy River beneath wooded banks in Maryland.
Monocacy River Water Trail paddling contextPhoto by Saki / National Park Service
National Park Service public-agency image

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.

  • Official route segmentGambrill Mill to Monocacy Boat Ramp, Section 3 of the Monocacy Scenic Water Trail

    Frederick County names the lower section and its endpoint pair.

    Source

  • Direct flow guidanceAt least 215 cfs or 1.7 ft below Devilbiss; 5 ft or higher hazardous

    NPS publishes the below-Devilbiss threshold and high-water warning.

    Source

  • Lower endpointSigned Monocacy Boat Ramp near the C&O Canal aqueduct

    NPS identifies the ramp as the lower water-trail access and warns paddlers to follow the signed split in the road.

    Source

  • Live gaugeUSGS 01643000, Monocacy River at Jug Bridge near Frederick, 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

    NPS-published Monocacy River paddling photograph used as corridor context; it does not certify current water, access, or hazard conditions.

    Source

Verify it yourselfCheck the source links

Use these links to double-check the gauge, route details, and access notes before you head out.

Reports

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Photos

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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

All 131 routes
Maryland route guideBrowse every tracked Maryland route.Frederick County / Central MarylandJump to routes in this region.

More on Monocacy River

All 3
Devilbiss Bridge to Gambrill Mill at Monocacy National BattlefieldFrederick County / Central MarylandEasy · Approximately 12.7 river miles, official Monocacy Scenic Water Trail Section 2Maryland Route 77 / Rocky Ridge to Devilbiss BridgeFrederick County / Central MarylandEasy · Approximately 11.5 river miles, official Monocacy Scenic Water Trail Section 1

Nearby routes within 75 miles

Catoctin CreekCatoctin Creek Park & Nature Center to C&O Lander Boat Ramp / Potomac · about 10 straight-line mi awayModerate · Approximately 10.1 moving-water miles from Catoctin Creek Park to the C&O Lander Boat Ramp at the PotomacPotomac RiverMouth of Monocacy / Monocacy Aqueduct to Edwards Ferry Boat Ramp via Whites Ferry · about 11 straight-line mi awayEasy · Approximately 11.7 river miles downstream from the Monocacy mouth through the Potomac Islands WMA to Edwards FerryPotomac RiverPoint of Rocks Boat Ramp to Monocacy Aqueduct Boat Ramp via Nolands Ferry · about 11 straight-line mi awayEasy · Approximately 6.2 river miles downstream from Point of Rocks through Nolands Ferry to the Monocacy AqueductCatoctin CreekDoub's Meadow Park to Catoctin Creek Park & Nature Center · about 13 straight-line mi awayModerate · Approximately 16.2 river miles from Doub’s Meadow Park to Catoctin Creek Park & Nature Center

Quick answers

Monocacy River paddling FAQ

What water level is best for the Gambrill Mill at Monocacy National Battlefield to Monocacy Boat Ramp / Dickerson route on the Monocacy 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 Gambrill Mill at Monocacy National Battlefield to Monocacy Boat Ramp / Dickerson route on the Monocacy River start and end?

This route starts at Gambrill Mill Tour Stop 4 public access and ends at Monocacy Boat Ramp at the Potomac confluence, Approximately 17.6 river miles, official Monocacy Scenic Water Trail Section 3 on the water.

Is the Gambrill Mill at Monocacy National Battlefield to Monocacy Boat Ramp / Dickerson route on the Monocacy River suitable for beginners?

This is listed as a easy 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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