San Diego Creek is a natural waterway located in Orange County, California. It flows through the city of Irvine and eventually empties into Upper Newport Bay. The creek is an important part of the local ecosystem, providing habitat for various wildlife species. The creek spans approximately 12 miles and is fed by several smaller tributaries. It plays a crucial role in managing stormwater runoff and helps maintain the area's water quality. Additionally, the surrounding areas offer recreational opportunities, including walking and biking trails for residents and visitors.