About this river
Williamson River is a 35.7 mile river near Sky Lakes Wilderness Adventures in Oregon. Streamflow is measured at the USGS gauge Williamson River near Klamath Agency, OR (site 11493500). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1955 to 2026
Williamson River typically runs highest in April, at a median 278 cfs, and lowest in July, at 0.0 cfs. The highest flow on record for any single day is 1,250 cfs, in 1958.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 103 | 0.0 to 246 | |
| February | 135 | 0.0 to 323 | |
| March | 267 | 76 to 466 | |
| April | 278 | 105 to 559 | |
| May | 142 | 18 to 279 | |
| June | 47 | 1.4 to 105 | |
| July | 0.0 | 0.0 to 24 | |
| August | 0.0 | 0.0 to 1.1 | |
| September | 0.0 | 0.0 to 0.2 | |
| October | 0.0 | 0.0 to 14 | |
| November | 0.0 | 0.0 to 143 | |
| December | 105 | 0.0 to 256 |
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 69 years of record. Statistics published by the US Geological Survey for Williamson River near Klamath Agency, OR (site 11493500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Williamson 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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