4 USGS Streamgages · Columbia River system
Rock Creek flows and levels
Rock Creek is gauged at 4 USGS streamgages in Oregon, each tracked by Rivermatics. The mainstem runs about 18 miles (29 km) from headwaters to outlet. It drains into the Columbia River system. It drains roughly 76 square miles at its outlet.
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.
| Gauge | State | Drainage sq mi | Elevation ft | April p50 cfs | July p50 cfs | Forecast |
|---|---|---|---|---|---|---|
| Rock Creek at Brookwood Avenue, Hillsboro, OR | OR | 72 | — | — | — | — |
| Rock Creek above Bethany Lake, near Bethany, OR | OR | — | — | — | — | — |
| Rock Creek below Bethany Lake, near Bethany, OR | OR | — | — | — | — | — |
| Rock Creek near Bethany Lake, near Bethany, OR | OR | — | — | — | — | — |
Common questions
- How many gauges are on the Rock Creek?
- Rivermatics tracks 4 USGS streamgages on the Rock Creek, across Oregon. 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.
- What river system is the Rock Creek part of?
- The Rock Creek drains into the Columbia River system — it is a tributary somewhere in that chain, following the flowpath down to its terminal river. Rivermatics builds this from the USGS/geoconnex reference-mainstem network rather than from names.
- Can I use Rock Creek 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.
Other rivers in the Columbia River system
- Snake River 31 gauges
- Willamette River 11 gauges
- Mckenzie River 9 gauges
- Big Wood River 8 gauges
- Bull Run River 6 gauges
- Cowlitz River 6 gauges
- Deschutes River 6 gauges
- Methow River 6 gauges