Rivermatics

USGS Streamgage 06036805

Firehole River at Old Faithful, YNP

Firehole River at Old Faithful, YNP is USGS streamgage 06036805 in Wyoming, monitoring river discharge in hydrologic subbasin 10020007. It sits on the Firehole River, alongside 1 other gauge Rivermatics tracks on the same river. It drains a watershed of about 40 square miles. Discharge records at this site go back to 2006. Typical flow runs near 57 cfs in July and 48.5 cfs in April, with the higher of the two arriving in July. 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
Wyoming
Drainage area
40 sq mi
Gauge elevation
7,343 ft
Subbasin (HUC-8)
10020007
Coordinates
44.45933, -110.82227
USGS site number
06036805
Records begin
2006-10-01 (20 years)
Rivermatics forecast
14-day flow outlook + water temperature

14-day flow forecast

Based on observations through for Firehole River at Old Faithful, YNP. 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
33.8 34.5 35.3
33.4 34.4 35.3
33.1 34.1 35.2
32.9 34.1 35.5
32.8 34 35.5
32.5 33.9 35.4
32.4 33.9 36
32.2 33.7 35.6
31.9 33.5 35.4
31.6 33.2 35.1
31.3 33 34.8
31.3 33 35.1
31.1 33 35.1
30.8 32.7 34.7

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 20 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 35.6 41.6 49.6
February 35.5 41.1 47.5
March 34.9 40.4 48.9
April 37.1 48.5 69.7
May 65 107.1 196.5
June 56.2 142.5 242.7
July 38.2 57 104.7
August 35 48.4 75.3
September 35.7 48.1 69.5
October 38.3 49.6 67.8
November 36.6 47 60.8
December 35.7 43.9 53.3

All values in cubic feet per second (cfs).

Common questions

When does Firehole River at Old Faithful, YNP normally run highest?
June, on the long-term record. The median daily flow that month is about 142.5 cfs, against 40.4 cfs in March, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Firehole River at Old Faithful, YNP?
It depends on the month. In January, half of days historically fall near 41.6 cfs, with the middle 80% of days between 35.6 and 49.6 cfs. The month-by-month table on this page gives the full range.
How long has Firehole River at Old Faithful, YNP been measured?
Discharge records at USGS site 06036805 begin in 2006, about 20 years, covering roughly 7,249 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Firehole River at Old Faithful, YNP?
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 Firehole River at Old Faithful, YNP?
The gauge sits at 44.45933, -110.82227, in Wyoming, in hydrologic subbasin 10020007, at an elevation of about 7,343 feet, draining roughly 40 square miles.
Can I use Firehole River at Old Faithful, YNP 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 Firehole River

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

Other gauges in this subbasin