Peters Canyon Wash is a tributary of San Diego Creek in central Orange County in the U.S. state of California. [1] About 11.8 miles (19.0 km) long north-south, the wash, now mostly channelized, flows in a relatively straight course southwest from the 55-acre (0.22 km2) Peters Canyon Reservoir near the Orange/ Tustin borderline to its confluence with San Diego Creek near the Irvine Civic Center Plaza. [2] Less than 5 miles (8.0 km) below this confluence, San Diego Creek empties into Upper Newport Bay. [3] The largest tributary of Peters Canyon is the Santa Ana Channel (not to be confused with the Santa Ana-Delhi Channel, which flows directly into Upper Newport Bay.)
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33°41′38″N 117°49′09″W / 33.69399614732679°N 117.81922743176183°W