Potomac River levels, gauges and monitoring stations
Check the live river overview or open an individual USGS gauge for current streamflow, gauge height, trends and historical context.
Follow the Potomac River
Trace the reviewed Potomac River mainstem geometry and use linked agency resources to plan for a specific reach.
Fishing the river
The upper mainstem is widely managed as a smallmouth-bass river, while tidal reaches support largemouth bass, blue catfish and seasonal migratory fish including American shad. Maryland, Virginia, West Virginia and District rules can differ on opposite banks and by reach; fish-consumption guidance is separate from fishing regulations.
Fish you may encounter
Where the river changes
- Rules, seasons, closures and consumption advice vary by jurisdiction and can change; consult the linked fish and wildlife agency before a trip.
- A gauge reading describes conditions at that monitoring location; it does not establish fishing quality or safety elsewhere on the river.
On the water
The Potomac ranges from quiet canal-adjacent reaches to powerful rapids at Great Falls and tidal water below Washington. The National Park Service documents paddling in specific reaches; Great Falls itself is a hazardous whitewater gorge, not a general launch recommendation.
- Use the linked managing-agency information for current access, permits, closures and river conditions.
- Do not treat station data as a substitute for local hazard information, weather forecasts or on-water judgment.