About this river
Rockcastle River is a 9.5 mile river near Get Outside Kentucky in Kentucky. Streamflow is measured at the USGS gauge Rockcastle River at Billows, KY (site 03406500). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1936 to 2025
Rockcastle River typically runs highest in March, at a median 1,160 cfs, and lowest in September, at 41 cfs. The highest flow on record for any single day is 46,200 cfs, in 1979.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 874 | 428 to 1,770 | |
| February | 1,080 | 615 to 2,010 | |
| March | 1,160 | 663 to 2,090 | |
| April | 893 | 494 to 1,735 | |
| May | 415 | 228 to 909 | |
| June | 175 | 90 to 416 | |
| July | 115 | 49 to 321 | |
| August | 80 | 32 to 187 | |
| September | 41 | 19 to 122 | |
| October | 41 | 17 to 119 | |
| November | 123 | 42 to 408 | |
| December | 623 | 243 to 1,290 |
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 82 years of record. Statistics published by the US Geological Survey for Rockcastle River at Billows, KY (site 03406500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
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Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Rockcastle 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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