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John Day River in Oregon

River62.1 mi

Around here

Around John Day River

John Day Lock and Dam, Lake Umatilla21.7 miJohn Day Wild and Scenic River22 mi10 mi

Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US

About this river

John Day River is a 62.1 mile river. Streamflow is measured at the USGS gauge John Day River at Mcdonald Ferry, OR (site 14048000). The National Hydrography Dataset places it at stream order 9. Reach geometry comes from the USGS National Hydrography Dataset.

Typical flow by month

1906 to 2026

John Day River typically runs highest in April, at a median 5,020 cfs, and lowest in September, at 130 cfs. The highest flow on record for any single day is 39,400 cfs, in 1965.

Show the numbers
Typical flow by month at John Day River at Mcdonald Ferry, OR, in cfs
MonthTypical (cfs)Usual range (cfs)
January980585 to 1,890
February1,670860 to 3,130
March2,6401,860 to 5,260
April5,0203,440 to 7,480
May4,6102,730 to 6,950
June2,1601,300 to 3,465
July418256 to 643
August13075 to 220
September13071 to 203
October306242 to 393
November439375 to 580
December612439 to 1,190

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 119 years of record. Statistics published by the US Geological Survey for John Day River at Mcdonald Ferry, OR (site 14048000). 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 John Day River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.

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