About this river
Green River is a 38.8 mile river near Adventures of Mammoth Cave in Kentucky. Streamflow is measured at the USGS gauge Green River at Munfordville, KY (site 03308500). The National Hydrography Dataset places it at stream order 7. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1970 to 2026
Green River typically runs highest in February, at a median 4,700 cfs, and lowest in September, at 362 cfs. The highest flow on record for any single day is 62,800 cfs, in 1984.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 3,800 | 1,430 to 6,980 | |
| February | 4,700 | 2,280 to 7,170 | |
| March | 4,280 | 2,270 to 6,750 | |
| April | 2,865 | 1,170 to 6,010 | |
| May | 1,750 | 782 to 5,320 | |
| June | 839 | 544 to 2,820 | |
| July | 573 | 363 to 1,050 | |
| August | 457 | 294 to 808 | |
| September | 362 | 233 to 826 | |
| October | 502 | 253 to 1,550 | |
| November | 1,240 | 707 to 2,845 | |
| December | 2,930 | 1,160 to 5,670 |
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 52 years of record. Statistics published by the US Geological Survey for Green River at Munfordville, KY (site 03308500). 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 Green River. Ramp data comes from the USGS national boat-ramp inventory.
- Munfordville - Stovall ParkGreen RiverPublic
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