Casselman River in Pennsylvania
Around here
Around Casselman River
Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US
About this river
Casselman River is a 56.2 mile river. Streamflow is measured at the USGS gauge Casselman River at Grantsville, MD (site 03078000). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1947 to 2026
Casselman River typically runs highest in March, at a median 176 cfs, and lowest in September, at 11 cfs. The highest flow on record for any single day is 3,600 cfs, in 1996.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 110 | 64 to 192 |
| February | 125 | 76 to 227 |
| March | 176 | 114 to 300 |
| April | 143 | 96 to 251 |
| May | 109 | 63 to 188 |
| June | 47 | 24 to 92 |
| July | 23 | 11 to 47 |
| August | 15 | 7.4 to 33 |
| September | 11 | 5.0 to 25 |
| October | 15 | 8.2 to 41 |
| November | 53 | 23 to 104 |
| December | 105 | 61 to 171 |
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 79 years of record. Statistics published by the US Geological Survey for Casselman River at Grantsville, MD (site 03078000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
3 mapped launches sit in the mapped area of Casselman River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.
- South AccessHigh Point Lake (South)Public
- North AccessHigh Point Lake (North)Public
- MarkletonCasselman RiverPublic
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Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Casselman 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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