Rivermatics

13 USGS Streamgages

Klamath River flows and levels

Klamath River is gauged at 13 USGS streamgages in Oregon and California, each tracked by Rivermatics. The mainstem runs about 369 miles (593 km) from headwaters to outlet. It drains roughly 13,426 square miles at its outlet. The gauged reach falls about 4,085 feet, from 4,090 feet down to 5. Rivermatics issues a daily machine-learned 14-day flow outlook at 5 of them.

Gauges on this river, upstream to downstream

Ordered by drainage area, which is how far down the river each gauge sits. April and July figures are long-term median daily flows for that month from the USGS record — historical normals, not a forecast and not today's reading.

USGS streamgages on this river, ordered upstream to downstream
Gauge State Drainage sq mi Elevation ft April p50 cfs July p50 cfs Forecast
Klamath River at Keno, OR OR 3,920 3,961 1,619 635.5 14-day + temp
Klamath River below John C.Boyle Pwrplnt, near Keno, OR OR 4,080 3,275 1,814.3 735.3 14-day + temp
Klamath River below Iron Gate Dam, CA CA 4,630 2,166 2,053.7 788 14-day
Klamath River near Seiad Valley, CA CA 6,940 1,314 5,106.3 1,294.8 14-day
Klamath River Ab Fall C near Copco, CA CA 8,000 2,343 — — —
Klamath River near Klamath, CA CA 12,100 5 22,280 4,149.7 14-day + temp
Klamath River above Keno Dam, at Keno - Bottom OR — 4,090 — — —
Klamath River above Keno Dam, at Keno, OR OR — 4,087 — — —
Klamath River at Miller Island Boat Ramp-Bottom OR — 4,087 — — —
Klamath River at Miller Island Boat Ramp, OR OR — 4,087 — — —
Klamath River at Miller Island, near Midland, OR OR — 4,062 — — —
Klamath River below Keno Dam, at Keno, OR OR — 4,050 — — —
Klamath River near Klamath Falls, OR OR — — — — —

Common questions

How many gauges are on the Klamath River?
Rivermatics tracks 13 USGS streamgages on the Klamath River, across Oregon and California. Each has its own page with the site's full flow record and monthly normals. The river may carry other gauges that publish neither daily values nor discharge statistics; those are not tracked here.
Is there a flow forecast for the Klamath River?
Yes, at 5 of the 13 gauges. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on each basin's observed flows, weather and snowpack, and issues a daily outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on each gauge's live screen.
Can I use Klamath River 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.

Browse nearby gauges by state