High Quality Content by WIKIPEDIA articles! Chino Creek is a major stream of the Inland Empire in Southern California in the United States. Although the main stem is short at about 12.7 miles (20.4 km), it drains an extensive basin of 218 square miles (560 km2) from the San Gabriel Mountains to the Santa Ana River near Corona. The creek`s watershed spans three counties, with the majority in San Bernardino County, and parts of seven incorporated cities.