Rivermatics

USGS Streamgage 14138850

Bull Run River near Multnomah Falls, OR

Bull Run River near Multnomah Falls, OR is USGS streamgage 14138850 in Oregon, monitoring river discharge in hydrologic subbasin 17080001. It sits on the Bull Run River, alongside 5 other gauges Rivermatics tracks on the same river. It drains a watershed of about 48 square miles. Discharge records at this site go back to 1966. Typical flow runs near 85.9 cfs in July and 442.4 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead, alongside daily high and low water-temperature forecasts.

View live conditions & forecast →

Gauge details

State
Oregon
Drainage area
48 sq mi
Subbasin (HUC-8)
17080001
Coordinates
45.49817, -122.0123
USGS site number
14138850
Records begin
1966-07-22 (60 years)
Rivermatics forecast
14-day flow outlook + water temperature

14-day flow forecast

Based on observations through for Bull Run River near Multnomah Falls, OR. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
33.9 35 36
33.7 35.2 37
34.7 37.6 44
34.4 37.2 44.3
33.3 35.3 38.5
32.6 34.5 36.8
32 33.9 36
31.6 33.5 35.7
31 33 35.1
30.7 32.7 34.7
30.5 32.4 34.4
30.3 32.3 34.3
30 32 34.1
29.8 31.8 33.9

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 60 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 167.2 418.9 1,600.8
February 158.6 377.8 1,313.2
March 195.5 409.6 1,016.4
April 245.3 442.4 924.1
May 163.3 370.9 808.9
June 90.5 209.9 559.7
July 53.2 85.9 172.5
August 40.6 53.1 114.7
September 38.2 59 196.6
October 44.1 127.9 602.1
November 126.5 404.3 1,372.3
December 166.9 414.9 1,757.4

All values in cubic feet per second (cfs).

Common questions

When does Bull Run River near Multnomah Falls, OR normally run highest?
April, on the long-term record. The median daily flow that month is about 442.4 cfs, against 53.1 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Bull Run River near Multnomah Falls, OR?
It depends on the month. In January, half of days historically fall near 418.9 cfs, with the middle 80% of days between 167.2 and 1,600.8 cfs. The month-by-month table on this page gives the full range.
How long has Bull Run River near Multnomah Falls, OR been measured?
Discharge records at USGS site 14138850 begin in 1966, about 60 years, covering roughly 9,201 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Bull Run River near Multnomah Falls, OR?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. A companion model forecasts each day's water-temperature high and low. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
Where is Bull Run River near Multnomah Falls, OR?
The gauge sits at 45.49817, -122.0123, in Oregon, in hydrologic subbasin 17080001, draining roughly 48 square miles.
Can I use Bull Run River near Multnomah Falls, 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.

Upstream and downstream on the Bull Run River

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Bull Run River in full.

Other gauges in this subbasin