Sign inSign up free Sign inSign up freeSplit-water fishing maps
Fishing maps for the upper and tidal Potomac River.
Built for useful map scale
The freshwater upper river and tidal lower river are different fishing systems and need separate depth context.
One page per mapped area
Hancock to Williamsport — classic upper Potomac smallmouth ledges with a growing muskie fishery.
Washington, D.C. to Mattawoman Creek — the tidal Potomac’s famous grass beds: trophy largemouth, blue catfish, spring stripers and the invasive snakehead “Frankenfish.”
Choose with the evidence visible
The released set contains 1 survey-backed reach and 1 modeled reach. Their published maximum depths run from 10 to 75 ft, with a median of 75 ft. Those numbers make scale differences visible, but they do not make sections interchangeable: contour provenance, access, species evidence and local structure remain specific to each child map.
Start with the section closest to the water you actually plan to fish. Then compare its depth-data label and species roster with an adjacent section before treating a pattern as system-wide. A survey-backed child is the stronger choice for precise breakline planning; a modeled child is broader reconnaissance and should be checked against sonar and conditions on the water. Return to this overview whenever you cross into another mapped reach, pool or coastal section.
Same child-page contract
Planning questions
The freshwater upper river and tidal lower river are different fishing systems and need separate depth context.
1 released maps use surveyed or official agency bathymetry. Each child keeps its own provider, product, datum and not-for-navigation disclosure.
No. Species, forage, access and fishing spots remain scoped to each child map and retain their evidence labels.