About this river
Columbia River is a 14.0 mile river near St. Helens Marina in Oregon. Streamflow is measured at the USGS gauge Columbia Slough at Portland, OR (site 14211820). The National Hydrography Dataset places it at stream order 11. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1990 to 2026
Columbia River typically runs highest in January, at a median 151 cfs, and lowest in May, at 67 cfs. The highest flow on record for any single day is 2,400 cfs, in 1996.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 151 | 90 to 235 | |
| February | 150 | 83 to 223 | |
| March | 134 | 68 to 196 | |
| April | 108 | 38 to 180 | |
| May | 67 | -11 to 145 | |
| June | 88 | 15 to 158 | |
| July | 94 | 50 to 142 | |
| August | 78 | 35 to 122 | |
| September | 74 | 36 to 112 | |
| October | 90 | 46 to 132 | |
| November | 110 | 62 to 161 | |
| December | 128 | 73 to 203 |
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 35 years of record. Statistics published by the US Geological Survey for Columbia Slough at Portland, OR (site 14211820). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
8 mapped launches sit in the mapped area of Columbia River. Ramp data comes from the USGS national boat-ramp inventory.
- Brown's Landing CourtMultnomah ChannelRestricted
- Gilbert RiverMultnomah ChannelPublic
- Scappoose Bay Marina ParkScappoose BayPublic
- St. Helens MarinaColumbia RiverRestricted
- Kalama MarinaColumbia RiverPublic
- Scipio's Goble LandingColumbia RiverRestricted
- Sportsman's ClubKalama RiverPublic
- Fisherman's LoopKalama RiverPublic
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Columbia 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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