31 USGS Streamgages · Columbia River system
Snake River flows and levels
Snake River is gauged at 31 USGS streamgages in Wyoming, Idaho, Oregon, and Washington, each tracked by Rivermatics. The mainstem runs about 1,058 miles (1,703 km) from headwaters to outlet. It drains into the Columbia River system. It drains roughly 93,912 square miles at its outlet. The gauged reach falls about 865 feet, from 6,831 feet down to 5,967. Rivermatics issues a daily machine-learned 14-day flow outlook at 24 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 |
|---|---|---|---|---|---|---|
| Snake River Ab Jackson Lake at Flagg Ranch, WY | WY | 486 | 6,831 | 596.1 | 674.5 | 14-day + temp |
| Snake River near Moran, WY | WY | 807 | 6,747 | 369.1 | 3,115.5 | 14-day + temp |
| Snake River at Moose, WY | WY | 1,674 | 6,454 | 1,411 | 4,598.7 | 14-day + temp |
| Snake River below Flat Creek, near Jackson, WY | WY | 2,672 | 5,967 | 2,107.3 | 5,481.3 | 14-day + temp |
| Snake River above Reservoir, near Alpine, WY | WY | 3,465 | — | 2,852.7 | 7,460.3 | 14-day + temp |
| Snake River near Irwin, ID | ID | 5,225 | — | 4,714.3 | 12,616.1 | 14-day |
| Snake River near Heise, ID | ID | 5,752 | — | 5,242.3 | 12,967.7 | 14-day |
| Snake River at Lorenzo, ID | ID | 5,810 | — | 4,141 | 6,622.3 | 14-day |
| Snake River Ab Eagle Rock near Idaho Falls, ID | ID | 9,533 | — | 4,856 | 7,134.8 | 14-day |
| Snake River near Shelley, ID | ID | 9,790 | — | 5,694.3 | 6,130.6 | 14-day |
| Snake River at Blackfoot, ID | ID | 9,950 | — | 4,281.7 | 3,253.5 | 14-day |
| Snake River near Blackfoot, ID | ID | 11,310 | — | 5,022 | 3,073.2 | 14-day |
| Snake River at Neeley, ID | ID | 13,600 | — | 6,715 | 12,283.9 | 14-day |
| Snake River near Minidoka Id at Howells Ferry | ID | 15,700 | — | 6,043.7 | 9,321.9 | 14-day |
| Snake River near Kimberly, ID | ID | 22,340 | — | 2,343.3 | 631.3 | — |
| Snake River near Twin Falls, ID | ID | 22,360 | — | 3,261 | 734.5 | 14-day |
| Snake River at Pigeon Cove near Twin Falls, ID | ID | 22,830 | — | 875.8 | 2,733.2 | 14-day |
| Snake River near Buhl, ID | ID | 22,990 | — | 4,066.3 | 2,508.7 | 14-day |
| Snake River below Lower Salmon Falls near Hagerman, ID | ID | 26,070 | — | 8,377 | 6,214.8 | — |
| Snake River below Bliss Dam near Bliss, ID | ID | 35,500 | — | 7,059 | 7,664.8 | — |
| Snake River at King Hill, ID | ID | 35,800 | — | 10,295.7 | 7,435.5 | 14-day + temp |
| Snake River below Swan Falls Dam, ID | ID | 41,900 | — | 10,847.3 | 7,284.8 | — |
| Snake River near Murphy, ID | ID | 41,900 | — | 10,996.3 | 7,125.2 | 14-day |
| Snake River at Nyssa, OR | ID | 58,700 | — | 13,003.3 | 7,547.1 | 14-day |
| Snake River at Weiser, ID | ID | 69,200 | — | 22,996.7 | 10,180.3 | 14-day + temp |
| Snake River at Hells Canyon Dam Id-Or State Line | OR | 73,300 | — | 22,360 | 13,041.9 | — |
| Snake River at Johnson Bar Id-Or State Line | OR | 73,400 | — | — | — | — |
| Snake River near Anatone, WA | WA | 92,960 | — | 42,206.7 | 25,848.4 | 14-day |
| Snake River at McDuff Rapids at China Garden, ID | ID | — | — | 34,150 | 23,680.6 | 14-day + temp |
| Snake River near Menan, ID | ID | — | — | 5,327.7 | 8,007.7 | 14-day |
| Snake River near Powers, WA | WA | — | — | — | — | — |
Common questions
- How many gauges are on the Snake River?
- Rivermatics tracks 31 USGS streamgages on the Snake River, across Wyoming, Idaho, Oregon, and Washington. 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 Snake River?
- Yes, at 24 of the 31 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 Snake River part of?
- The Snake River drains into the Columbia 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 Snake 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 Columbia River system
- Willamette River 11 gauges
- Mckenzie River 9 gauges
- Big Wood River 8 gauges
- Bull Run River 6 gauges
- Cowlitz River 6 gauges
- Deschutes River 6 gauges
- Methow River 6 gauges
- North Santiam River 6 gauges