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Around North Branch Patapsco River
Marinas3
Data Source: Recreation.gov · Public land: USGS PAD-US
About this river
North Branch Patapsco River is a 20.8 mile river near Watermark Tours, Charters, Cruises in Maryland. Streamflow is measured at the USGS gauge North Branch Patapsco River at Cedarhurst, MD (site 01586000). The National Hydrography Dataset places it at stream order 5. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1945 to 2026
North Branch Patapsco River typically runs highest in March, at a median 72 cfs, and lowest in September, at 26 cfs. The highest flow on record for any single day is 6,000 cfs, in 1972.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 51 | 34 to 82 |
| February | 63 | 43 to 92 |
| March | 72 | 53 to 104 |
| April | 71 | 49 to 103 |
| May | 60 | 42 to 92 |
| June | 44 | 31 to 66 |
| July | 34 | 24 to 51 |
| August | 28 | 20 to 41 |
| September | 26 | 17 to 39 |
| October | 27 | 20 to 43 |
| November | 34 | 25 to 51 |
| December | 44 | 29 to 73 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 80 years of record. Statistics published by the US Geological Survey for North Branch Patapsco River at Cedarhurst, MD (site 01586000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
One mapped launch sits in the mapped area of North Branch Patapsco River. Ramp data comes from the USGS national boat-ramp inventory.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show North Branch Patapsco River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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