Big Tujunga Creek is a major stream in Los Angeles County in the U.S. state of California. From its headwaters high in the San Gabriel Mountains, it flows generally southwest for , joining Little Tujunga Creek to form the Tujunga Wash near Pacoima. The stream is sometimes considered as one with the Tujunga Wash, which is the continuation of Big Tujunga to the Los Angeles River, bringing the total length to more than . The name of the stream is derived from a Tongva village name.