| Big River Arroyo Grande | |
|---|---|
&sq=Qlik&lang=&file=File:BigRiver.jpg) Big River, from the Big River Unit of Mendocino Headlands State Park | |
&sq=Qlik&lang=&file=File:Relief_map_of_California.png)  Location of the mouth in California | |
| Location | |
| Country | United States |
| State | California |
| Region | Mendocino County |
| Physical characteristics | |
| Source | Impassable Rocks |
| • location | 7 mi (11 km) south of Willits, California |
| • coordinates | 39°19′3″N 123°22′23″W / 39.31750°N 123.37306°W[1] |
| Mouth | Pacific Ocean |
• location | Mendocino, California |
• coordinates | 39°18′8″N 123°47′41″W / 39.30222°N 123.79472°W[1] |
• elevation | 0 ft (0 m) |
| Basin size | 181 sq mi (470 km2) |
&sq=Qlik&lang=&file=File:Big_River_pilings_1.jpg)
The Big River is a 41.7-mile-long (67.1 km)[2] river in Mendocino County, California, that flows from the northern California Coast Range to the Pacific Ocean at Mendocino, Mendocino County, California. From the mouth, brackish waters extend 8 miles (13 km) upstream, forming the longest undeveloped estuary in the state.
- ^ a b U.S. Geological Survey Geographic Names Information System: Big River
- ^ U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map Archived 2012-03-29 at the Wayback Machine, accessed March 9, 2011