Rivers in California

West Walker River near Coleville (Upper Gage)

Mono County, CaliforniaNWS WWBC1USGS 10296000Reno office

Below flood stage
0.85ftStage

Observed Tue, Sep 22, 12:30 PM PDT

Flood stage
6.00 ft
Forecast crest
0.75 ftTue, Sep 22, 2:00 PM PDT
Record crest
9.99 ft1997

Open the live map with the river flood outlook

Flood stages and impacts

CategoryStage
Major flood7.30 ft
Moderate flood6.80 ft
Minor flood6.00 ft
Action5.50 ft
  1. 10.50 ftIncredible flood disaster with massive and uncertain impacts in excess of the January 1997 event.
  2. 10.00 ftFlood of record. Highway 395 in West Walker River Canyon closed for months. Massive destruction to infrastructure and economy including transportation, power, water, homes, businesses, etc. Area isolated. Near this flow in January 1997 a 6.5-mile stretch of Highway 395 completely scoured with debris from the canyon deposited in the town of Walker.
  3. 9.50 ftNear record flooding. Area cut off as most transportation routes into area destroyed or flooded. Massive destruction of infrastructure and economy including utilities, roads, business, homes, etc.
  4. 8.50 ftFlood disaster from Walker River Canyon through Antelope Valley. Widespread flood damage to roads, bridges, homes and structures along river. Severe damage to Highway 395 in W Walker River Canyon with the highway likely closed. Historically this flow has been exceeded only once in January 1997.
  5. 8.00 ftFlooding near disaster levels in the West Walker Canyon and in Antelope Valley. Numerous structures flooded and roads washed out. Sections of Highway 395 likely destroyed in West Walker Canyon. Major damage to agricutural land due to erosion and destroyed diversion dams, headgates, canals and levees. Similar to the 2nd highest flood of record in November of 1950, and only exceeded in January 1997.
  6. 7.30 ftMajor flooding in the West Walker River Canyon and in Antelope Valley including Walker, Coleville and Topaz California. Many buildings flooded and roads washed out. Major damage to agricultural lands. Extensive sandbagging required to protect propery. Transportiation affected. Damage to Highway 395 in the West Walker Canyon likely. Similar to the 4th highest peak flow in the 85 year gage record.
  7. 6.80 ftModerate flooding of lowlands, agricultural land, yards, basements and rural roads in the West Walker River Canyon and in Antelope Valley including Walker, Coleville and Topaz California. Flooding of structures limited although some sandbagging necessary Roughly similar, but slightly below the June 2017 peak.
  8. 6.50 ftExpanding minor flooding of lowlands, pastures and some rural roads between the West Walker River Canyon and Topaz Lake, including Walker Coleville and Topaz California. Out of bank flows may cause significant erosion of agricuturural lands. Similar to the peak of June 2023.
  9. 6.00 ftFlood stage. Minor flooding of lowlands pasture & rural roads in Antelope Valley including Walker, Coleville and Topaz California. Roughly similar to June 2019 and October 2021 crests.
  10. 5.50 ftMonitor Stage, No flooding in reach from West Walker River Canyon through Antelope Valley CA including Walker, Coleville, Topaz CA.

Flood outlook

Chance of flooding, September to November

CategoryChance
Minor floodingUnder 5%
Moderate floodingUnder 5%
Major floodingUnder 5%

The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 22, 2026.

Crest history

22 crests on NOAA’s list since 1937.

#DateStage
1January 2, 19979.99 ft
2November 20, 19507.86 ft
3December 11, 19377.71 ft
4December 23, 19557.37 ft
5May 16, 19967.07 ft
6June 20, 20176.88 ft
7June 5, 20176.81 ft
8June 24, 20116.75 ft
9July 9, 19956.65 ft
10June 19, 20236.62 ft
11May 20, 20066.59 ft
12June 7, 20106.57 ft
13May 28, 20056.39 ft
14June 4, 19696.39 ft
15June 18, 19836.26 ft
16April 8, 20186.20 ft
17July 3, 19676.11 ft
18June 1, 19866.10 ft
19October 25, 20216.05 ft
20May 30, 20036.04 ft
21June 7, 20196.00 ft
22December 23, 19645.99 ft

Most recent crests

  • June 19, 2023: 6.62 ft
  • October 25, 2021: 6.05 ft
  • June 7, 2019: 6.00 ft
  • April 8, 2018: 6.20 ft
  • June 20, 2017: 6.88 ft
  • June 5, 2017: 6.81 ft
  • June 24, 2011: 6.75 ft
  • June 7, 2010: 6.57 ft
  • May 20, 2006: 6.59 ft
  • May 28, 2005: 6.39 ft

Nearby

Upstream, downstream and the gauges around this one.

What this means

Forecasts by the California Nevada River Forecast Center. Forecasts are issued routinely year-round. Stage may be affected by ice during winter months. Reported historic crests have been estimated using recent ratings due to previous channel, location and/or datum changes. USGS observed crests can be found at: waterdata.usgs.gov/nwis/rt Please also see Additional Information tab at the bottom of this page.

Sources

Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.