Around here
Around Colusa Trough
Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US
About this river
Colusa Trough is a 26.9 mile river. Streamflow is measured at the USGS gauge Sacramento R at Colusa CA (site 11389500). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1946 to 2026
Colusa Trough typically runs highest in February, at a median 13,500 cfs, and lowest in October, at 5,740 cfs. The highest flow on record for any single day is 51,300 cfs, in 1983.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 11,100 | 6,970 to 28,200 |
| February | 13,500 | 7,830 to 29,700 |
| March | 13,000 | 8,290 to 23,000 |
| April | 8,820 | 6,735 to 15,550 |
| May | 8,240 | 6,660 to 12,300 |
| June | 7,900 | 6,675 to 10,400 |
| July | 8,510 | 7,340 to 9,990 |
| August | 7,910 | 6,930 to 8,970 |
| September | 7,010 | 5,975 to 8,180 |
| October | 5,740 | 4,900 to 7,210 |
| November | 6,070 | 4,970 to 8,095 |
| December | 8,570 | 5,900 to 17,200 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 80 years of record. Statistics published by the US Geological Survey for Sacramento R at Colusa CA (site 11389500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
2 mapped launches sit in the mapped area of Colusa Trough, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.
Made to print
Put Colusa Trough on your wall
This river section as an art print, drawn over the real terrain with its miles, plus the trails, roads and peaks around it. Pick the colors and the size, and see the finished print before you buy. From $39, shipping included.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Colusa Trough's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
See every free widget you can put on your site, including live conditions and a 7 day forecast.
