9 USGS Streamgages · Colorado River system
Green River flows and levels
Green River is gauged at 9 USGS streamgages in Wyoming and Utah, each tracked by Rivermatics. The mainstem runs about 743 miles (1,196 km) from headwaters to outlet. It drains into the Colorado River system. It drains roughly 44,150 square miles at its outlet. The gauged reach falls about 3,525 feet, from 7,475 feet down to 3,950. Rivermatics issues a daily machine-learned 14-day flow outlook for every one 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 |
|---|---|---|---|---|---|---|
| Green River at Warren Bridge, near Daniel, WY | WY | 461 | 7,475 | 257.9 | 1,118 | 14-day |
| Green River near La Barge, WY | WY | 3,825 | 6,532 | 1,266.5 | 2,574.5 | 14-day |
| Green River below Fontenelle Reservoir, WY | WY | 4,197 | 6,400 | 1,255.3 | 1,831 | 14-day + temp |
| Green River near Greendale, UT | UT | 19,400 | 5,621 | 1,288 | 1,649.4 | 14-day + temp |
| Green River near Jensen, UT | UT | 29,660 | 4,777 | 4,718.7 | 3,541.6 | 14-day + temp |
| Green River at Ouray, Utah | UT | 31,060 | 4,668 | 4,157 | 2,551.9 | 14-day |
| Green River at Green River, UT | UT | 44,850 | 4,057 | 5,928 | 5,991.3 | 14-day + temp |
| Green River at Mineral Bottom near Cynlnds Ntl Park | UT | 48,560 | 3,950 | 4,620.7 | 3,381.9 | 14-day |
| Green River below Swaseys Rapid near Green River, UT | UT | — | 4,094 | — | — | 14-day |
Common questions
- How many gauges are on the Green River?
- Rivermatics tracks 9 USGS streamgages on the Green River, across Wyoming and Utah. 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 Green River?
- Yes, at 9 of the 9 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 Green River part of?
- The Green River drains into the Colorado 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 Green 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 Colorado River system
- Gila River 17 gauges
- San Juan River 10 gauges
- Animas River 9 gauges
- Gore Creek 9 gauges
- Little Colorado River 9 gauges
- Virgin River 8 gauges
- Yampa River 8 gauges
- Dolores River 7 gauges