Boiling River at Mammoth,YNP water level

Name: Boiling River at Mammoth,YNP water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, Boiling River, Wyoming, United States

Directions

Low for mid-October

Water level

1.10ft Steady over the last 24 hours

Measured Oct 19, 2026, 01:15 PM MDT (1 hour ago)

Flow: 20.1 cfs

History

7 days

Water level

What this means

At 1.10 ft, the Boiling River at Mammoth,YNP is below normal for mid-October.

It has barely moved over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. Over the past 30 days it has moved between 1.10 ft and 1.11 ft.

Fall is often low-water season on rivers, and it usually takes a few days of steady rain to change that.

Compared with 5 years of daily readings for this time of year. How to read levels

Key numbers

Highest on record: 1.50 ftMay 17, 1993

What the stage means on the water

Low water means more dragging on shallow riffles and slower floats. Fish crowd into the deeper runs, and warm, low water stresses them, so play and release them quickly.

What happens at each level

1.50 ft: RECORD STAGE.
1.10 ft: Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

Rank	Level	Date
1	1.50 ft	May 17, 1993
2	1.47 ft	May 18, 2003
3	1.45 ft	May 20, 1995
4	1.43 ft	May 24, 1991
5	1.41 ft	May 24, 2008
6	1.40 ft	May 5, 2006
7	1.40 ft	May 22, 2009
8	1.38 ft	May 26, 1989
9	1.37 ft	April 29, 1990
10	1.37 ft	July 17, 1992

Weather at the gauge

No rain in the last 3 days.

19 Mon 66° 37° – Wind 10 mph

20 Tue 66° 44° – Wind 9 mph

21 Wed 65° 42° – Wind 10 mph

22 Thu 68° 43° – Wind 6 mph

23 Fri 50° 39° 0.62 in, 92% Wind 7 mph

24 Sat 47° 26° – Wind 6 mph

25 Sun 52° 30° – Wind 7 mph

Forecast: Open-Meteo

Sunrise 07:44 AM Sunset 06:32 PM Daylight 10 hr, 48 min First quarter 62%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Gardner River near Mammoth, YNPRiver gauge, Gardner River	109 cfs	Low	±0	0.5 mi
Yellowstone River at Corwin Springs MTRiver gauge, Yellowstone River	1.29 ft	Below flood stage	−0.02 ft	10 mi
Lamar River near Tower Ranger Station YNPRiver gauge, Lamar River	1.02 ft	Below flood stage	−0.01 ft	15 mi
Tantalus Creek at Norris Junction, YNPRiver gauge, Tantalus Creek	3.9 cfs	Normal	±0	17 mi
Gibbon River at Madison Jct, YNPRiver gauge, Gibbon River	68.5 cfs	Very low	±0	25 mi
Firehole River near West Yellowstone MTRiver gauge, Firehole River	200 cfs	Very low	+2.0 cfs	27 mi
Madison River near West YellowstoneRiver gauge, Madison River	296 cfs	Very low	−7.0 cfs	29 mi
Yellowstone River at Yellowstone Lake Outlet YNPRiver gauge, Yellowstone River	2.92 ft	Below flood stage	−0.02 ft	33 mi

Questions and answers

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Boiling River at Mammoth,YNP today?

On Oct 19, 2026, 01:15 PM MDT, the water level was 1.10 ft. Steady over the last 24 hours.

Is Boiling River at Mammoth,YNP rising or falling?

Steady over the last 24 hours.

Is the level of Boiling River at Mammoth,YNP normal?

Low for mid-October. Compared with 5 years of daily readings for this time of year.

What is the highest water level ever recorded at Boiling River at Mammoth,YNP?

The highest level on record is 1.50 ft on May 17, 1993.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

Where does this data come from?

The values come directly from the U.S. Geological Survey, the official operator of this gauge, and are in the public domain. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:06190540 (Agency page)
Coordinates: 44.98513, -110.68934 (WGS84)
Vertical datum: NGVD29
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	1.10 ft	2026-10-19 19:15	Provisional
Flow	20.1 cfs	2026-10-19 19:15	Provisional
Water temperature	–	–	–

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How to cite

U.S. Geological Survey: Boiling River at Mammoth,YNP (usgs:06190540). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/wyoming/boiling-river-at-mammoth-ynp

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer