San Antonio Creek (Santa Barbara County, California)

San Antonio Creek is a significant waterway located in Santa Barbara County, California. It is a tributary of the Santa Ynez River. The creek's watershed encompasses a diverse range of habitats, from coastal plains to chaparral-covered hillsides. The creek is known to support several species of native plants and animals, including sensitive and endangered species.

The flow regime of San Antonio Creek is highly variable, influenced by seasonal rainfall patterns typical of the Mediterranean climate of Southern California. Flows are generally highest during the winter and spring months, following periods of significant precipitation, and are greatly reduced during the dry summer and fall months.

The creek and its surrounding watershed have been subject to a variety of human impacts, including agricultural development, urbanization, and water diversions. These activities have affected water quality, riparian habitat, and the overall ecological health of the creek. Conservation efforts are underway to mitigate these impacts and restore the natural functions of San Antonio Creek. These efforts often focus on enhancing riparian vegetation, improving water quality, and managing stormwater runoff.

The name "San Antonio" is likely derived from a historical association with Mission San Antonio de Padua, although direct documentation linking the creek to the mission may be limited.