Tijeras Canyon Creek is a watercourse in northeast Orange County, California and a tributary of Arroyo Trabuco.

It originates in the foothills of the Santa Ana Mountains, and flows southwest through the suburban city of Rancho Santa Margarita for several miles as an underground culvert.

[2] Due to its relatively natural condition, the lower Tijeras Creek provides habitat for the threatened arroyo chub, which is endemic to coastal Southern California streams.

Large numbers of native fish were observed there during field studies in 2010.

The contaminated water traveled into Trabuco and San Juan Creeks before reaching the Pacific Ocean, forcing a six-day closure at Doheny State Beach.