Around here
Around East Branch North Fork Mattole River
Before you go
Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US · Forest roads: USDA Forest Service MVUM · BLM routes and areas: Bureau of Land Management (simplified for web display)
About this river
East Branch North Fork Mattole River is a 5.3 mile river. Streamflow is measured at the USGS gauge Mattole R near Petrolia CA (site 11469000). The National Hydrography Dataset places it at stream order 5. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1912 to 2026
East Branch North Fork Mattole River typically runs highest in January, at a median 1,630 cfs, and lowest in September, at 30 cfs. The highest flow on record for any single day is 55,200 cfs, in 1965.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 1,630 | 722 to 4,090 |
| February | 1,510 | 759 to 3,630 |
| March | 1,410 | 741 to 2,800 |
| April | 674 | 400 to 1,325 |
| May | 306 | 225 to 460 |
| June | 143 | 104 to 207 |
| July | 66 | 53 to 93 |
| August | 38 | 30 to 47 |
| September | 30 | 23 to 42 |
| October | 44 | 26 to 85 |
| November | 279 | 94 to 1,165 |
| December | 1,220 | 423 to 3,320 |
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 77 years of record. Statistics published by the US Geological Survey for Mattole R near Petrolia CA (site 11469000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Made to print
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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 East Branch North Fork Mattole River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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