6 USGS Streamgages · Columbia River system
Bull Run River flows and levels
Bull Run River is gauged at 6 USGS streamgages in Oregon, each tracked by Rivermatics. The mainstem runs about 27 miles (43 km) from headwaters to outlet. It drains into the Columbia River system. Drainage area at the gauges ranges from 5 square miles at Bull Run River at Lower Flume near Brightwood, OR up to 108 at Bull Run River at Larson's Bridge, near Bull Run, OR. Rivermatics issues a daily machine-learned 14-day flow outlook at 4 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.
| Gauge | State | Drainage sq mi | Elevation ft | April p50 cfs | July p50 cfs | Forecast |
|---|---|---|---|---|---|---|
| Bull Run River at Lower Flume near Brightwood, OR | OR | 5 | — | 29.5 | 23.5 | 14-day + temp |
| Bull Run River near Multnomah Falls, OR | OR | 48 | — | 442.4 | 85.9 | 14-day + temp |
| Bull Run River below Bull Run Reservoir 2, near Bull Run, OR | OR | 103 | — | — | — | 14-day + temp |
| Bull Run River near Bull Run (River Only), OR | OR | 107 | — | 759.9 | 91.9 | 14-day |
| Bull Run River near Bull Run, OR | OR | 107 | — | 900.5 | 268 | — |
| Bull Run River at Larson's Bridge, near Bull Run, OR | OR | 108 | — | — | — | — |
Common questions
- How many gauges are on the Bull Run River?
- Rivermatics tracks 6 USGS streamgages on the Bull Run River, 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.
- Is there a flow forecast for the Bull Run River?
- Yes, at 4 of the 6 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.
- What river system is the Bull Run River part of?
- The Bull Run River 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 Bull Run 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.
Other rivers in the Columbia River system
- Snake River 31 gauges
- Willamette River 11 gauges
- Mckenzie River 9 gauges
- Big Wood River 8 gauges
- Cowlitz River 6 gauges
- Deschutes River 6 gauges
- Methow River 6 gauges
- North Santiam River 6 gauges