USGS Streamgage 11509500
Klamath River at Keno, OR
Klamath River at Keno, OR is USGS streamgage 11509500 in Oregon, monitoring river discharge in hydrologic subbasin 18010206. It drains a watershed of about 3,920 square miles. Discharge records at this site go back to 1904. Typical flow runs near 635.5 cfs in July and 1,619 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Oregon
- Drainage area
- 3,920 sq mi
- Gauge elevation
- 3,961 ft
- Subbasin (HUC-8)
- 18010206
- Coordinates
- 42.1332, -121.96223
- USGS site number
- 11509500
- Records begin
- 1904-06-01 (122 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 122 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 548.7 | 1,316.8 | 3,048.4 | |
| February | 475.6 | 1,328.6 | 4,012.1 | |
| March | 481.3 | 1,679.7 | 5,453.5 | |
| April | 464.1 | 1,619 | 4,914.7 | |
| May | 436.7 | 1,184 | 3,567.7 | |
| June | 304.2 | 796.1 | 2,447.3 | |
| July | 268.8 | 635.5 | 1,506.1 | |
| August | 408.5 | 747.6 | 1,544.2 | |
| September | 526.9 | 982.4 | 1,710 | |
| October | 634.5 | 1,107.7 | 2,070.6 | |
| November | 629.7 | 1,233.7 | 2,588.3 | |
| December | 564.7 | 1,369.4 | 2,969.4 |
All values in cubic feet per second (cfs).
Common questions
- When does Klamath River at Keno, OR normally run highest?
- March, on the long-term record. The median daily flow that month is about 1,679.7 cfs, against 635.5 cfs in July, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Klamath River at Keno, OR?
- It depends on the month. In January, half of days historically fall near 1,316.8 cfs, with the middle 80% of days between 548.7 and 3,048.4 cfs. The month-by-month table on this page gives the full range.
- How long has Klamath River at Keno, OR been measured?
- Discharge records at USGS site 11509500 begin in 1904, about 122 years, covering roughly 9,126 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Klamath River at Keno, OR?
- The gauge sits at 42.1332, -121.96223, in Oregon, in hydrologic subbasin 18010206, at an elevation of about 3,961 feet, draining roughly 3,920 square miles.
- Can I use Klamath River at Keno, OR data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.