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Flatrock River in Indiana

River35.5 mi

Around here

Around Flatrock River

10 mi

Camping4

Public land: USGS PAD-US

About this river

Flatrock River is a 35.5 mile river. Streamflow is measured at the USGS gauge Flatrock River at Columbus, IN (site 03363900). The National Hydrography Dataset places it at stream order 9. Reach geometry comes from the USGS National Hydrography Dataset.

Typical flow by month

1968 to 2026

Flatrock River typically runs highest in March, at a median 712 cfs, and lowest in September, at 75 cfs. The highest flow on record for any single day is 24,700 cfs, in 2008.

Show the numbers
Typical flow by month at Flatrock River at Columbus, IN, in cfs
MonthTypical (cfs)Usual range (cfs)
January455264 to 903
February546343 to 980
March712434 to 1,140
April658434 to 1,175
May561366 to 1,010
June412237 to 716
July220139 to 413
August12372 to 201
September7548 to 138
October7948 to 180
November16077 to 393
December378147 to 789

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 59 years of record. Statistics published by the US Geological Survey for Flatrock River at Columbus, IN (site 03363900). 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 Flatrock River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.

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