San Antonio Creek (Marin County, California)
| San Antonio Creek | |
| Arroyo de San Antonio | |
| stream | |
| Name origin: Spanish | |
| Country | United States |
|---|---|
| State | California |
| Region | Marin and Sonoma counties |
| Source | |
| - location | 7 mi (11 km) southwest of Petaluma, California |
| - elevation | 790 ft (241 m) |
| - coordinates | 38°10′54″N 122°44′36″W / 38.18167°N 122.74333°W |
| Mouth | Petaluma River |
| - location | west of Lakeville |
| - elevation | 0 ft (0 m) |
| - coordinates | 38°9′30″N 122°32′39″W / 38.15833°N 122.54417°WCoordinates: 38°9′30″N 122°32′39″W / 38.15833°N 122.54417°W |
| Length | 17.5 mi (28 km) |
San Antonio Creek is a northward then eastward-flowing stream in the California, United States, counties of Marin and Sonoma that forms part of the boundary between those counties. It empties into the tidal portion of the Petaluma River.
Two permanent Coast Miwok villages were located on San Antonio Creek: Meleya (southwest of Petaluma, California) and Amayelle.
San Antonio Creek is one of many California places named by the early Spanish colonists after Saint Anthony of Padua, a patron of the Franciscan Order. The creek traverses the Rancho Laguna de San Antonio land grant, dated May 6, 1839 and November 25, 1845, given by Governor Pío Pico to Bartolomé Bojorquez in 1845.
San Antonio Creek springs from the southwest flank of Antonio Mountain in Marin County. Historically, a natural laguna or shallow lake existed at the headwaters of San Antonio Creek, different from the Laguna de San Antonio, which exists to the west at the headwaters of Chileno Creek. The San Antonio Creek headwaters laguna was drained for agricultural purposes sometime between 1860 and 1885. From the headwaters the creek runs north 2 mi (3.2 km) into Chileno Valley. Turning east-southeast, it begins to define the county line. It passes under Chileno Valley Road and Point Reyes-Petaluma Road, then parallels San Antonio Road eastward to U.S. 101. It crosses under U.S. 101 where it was diverted around 1930 to the Schultz Slough and the Petaluma River. This diversion is 5.2 miles (8.4 km) upstream from its historical connection to the San Antonio Slough just west of Hog Island in the wetlands south of Petaluma, California. The diversion upstream lowered the creek's gradient, contributing to aggradation of sediments in the lower reaches.
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