Firehole River at Old Faithful, Ynp — Water Level & Flow
USGS gauge 06036805 reports gage height, discharge and water temperature from Firehole River at Old Faithful, Ynp in WY. Big Buoy shows the latest reading with a 7-day hydrograph, alongside National Weather Service flood categories where they are published.
Latest reading
As of October 19, 2026 at 19:00 UTC, USGS gauge 06036805 on Firehole River at Old Faithful, Ynp recorded gage height 2.43 ft, discharge 38 cfs, and water temperature 47°F.
National Weather Service flood category: No Flooding.
Yellowstone National Park river levels — Firehole River at Old Faithful, Ynp is one of the gauges covered there.
Stage vs. flow — how to read a river gauge
Discharge (flow, in cubic feet per second) is comparable between gauges and is usually the better number for judging whether a river is up or down. Gage height is the water surface in feet above each gauge's own local datum, so it is local: the same 4 ft describes different rivers at two different gauges, and it is not the depth of the water. A gauge that reports nothing is shown as not reported — never as zero.
Frequently asked questions
- What is the water level on Firehole River at Old Faithful, Ynp?
- Gage height at Firehole River at Old Faithful, Ynp was 2.43 ft. Measured October 19, 2026 at 19:00 UTC at USGS gauge 06036805 (Firehole River at Old Faithful, YNP). Gage height is the water surface above this gauge’s own local datum, not the depth of the river.
- What is the flow on Firehole River at Old Faithful, Ynp?
- Discharge at Firehole River at Old Faithful, Ynp was 38 cubic feet per second. Measured October 19, 2026 at 19:00 UTC at USGS gauge 06036805 (Firehole River at Old Faithful, YNP). Discharge is comparable between gauges in a way gage height is not.
- What is the water temperature in Firehole River at Old Faithful, Ynp?
- Water temperature at Firehole River at Old Faithful, Ynp was 47°F. Measured October 19, 2026 at 19:00 UTC at USGS gauge 06036805 (Firehole River at Old Faithful, YNP).
- Is Firehole River at Old Faithful, Ynp flooding?
- The National Weather Service flood category for Firehole River at Old Faithful, Ynp was “No Flooding”. Measured October 19, 2026 at 19:00 UTC at USGS gauge 06036805 (Firehole River at Old Faithful, YNP). Flood categories are published by NOAA/NWS, not by Big Buoy.
- Where is USGS gauge 06036805?
- Firehole River at Old Faithful, YNP (USGS 06036805) reports from 44.459°N, 110.822°W in WY.
- How often does USGS gauge 06036805 update?
- This station records about every 15 minutes and transmits hourly, so a reading can be up to an hour old when you see it. Readings past three times the reporting interval are shown as last reported rather than as current conditions.
Data: USGS National Water Information System. Flood categories: NOAA/National Weather Service.