Around here
Around Patapsco River
- Bayshore CampgroundsRV park · ★ 4.48.4 mi (opens in a new tab)
- MWR Recreational Lodging - Suites at USNA, Cottages at Greenbury Point, and Campground at NSA AnnapolisRV park · ★ 4.710.8 mi (opens in a new tab)
- Washington DC / Capitol KOA HolidayRV park · ★ 4.014.4 mi (opens in a new tab)
- Camp Meade RV ParkRV park · ★ 4.218.6 mi (opens in a new tab)
- Eastern Neck National Wildlife RefugeRecreation area10.6 mi (opens in a new tab)
- Chesapeake Bay Maryland National Estuarine Research ReserveRecreation area11.1 mi (opens in a new tab)
- Captain John Smith Chesapeake National Historic TrailRecreation area11.3 mi (opens in a new tab)
- Chesapeake BayRecreation area11.3 mi (opens in a new tab)
Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US
About this river
Patapsco River is a 46.0 mile river near Eastern Watersports Baltimore Peninsula Rentals in Maryland. Streamflow is measured at the USGS gauge Patapsco River near Catonsville, MD (site 01589025). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
2011 to 2026
Patapsco River typically runs highest in March, at a median 257 cfs, and lowest in September, at 63 cfs. The highest flow on record for any single day is 9,990 cfs, in 2014.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 170 | 95 to 289 |
| February | 204 | 129 to 405 |
| March | 257 | 141 to 408 |
| April | 232 | 119 to 399 |
| May | 214 | 128 to 395 |
| June | 153 | 83 to 303 |
| July | 86 | 59 to 148 |
| August | 76 | 58 to 125 |
| September | 63 | 46 to 114 |
| October | 66 | 55 to 113 |
| November | 87 | 63 to 141 |
| December | 145 | 82 to 315 |
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 15 years of record. Statistics published by the US Geological Survey for Patapsco River near Catonsville, MD (site 01589025). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
8 mapped launches sit in the mapped area of Patapsco River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.
- Turner Station ParkBear CreekPublic
- Rocky PointBack River - Hawk CovePublic
- Baltimore County Sailing CenterBack River - Hawk CovePublic
- Merritt ParkBullneck CreekPublic
- Broening ParkMiddle Branch Patapsco RiverPublic
- Inverness ParkBear CreekPublic
- Sparrows Point Country ClubBear CreekPublic
- Cox Point ParkBack RiverPublic
Made to print
Put Patapsco River on your wall
This river section as an art print, drawn over the real terrain with its miles, plus the trails, roads and peaks around it. Pick the colors and the size, and see the finished print before you buy. From $39, shipping included.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Patapsco River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
See every free widget you can put on your site, including live conditions and a 7 day forecast.
