Its mouth is at its confluence with Wilson Creek at an elevation of 2,106 feet (642 m).

Its source is at 33°36′40″N 116°40′10″W / 33.61111°N 116.66944°W / 33.61111; -116.66944, at an elevation of 5,800 feet, on the west slope of Thomas Mountain 0.6 miles west-southwest of Tool Box Spring.

It flows southwest through the Anza Valley and Cahuilla Valley in the Cahuilla Indian Reservation to Wilson Creek, 7 miles south-southwest of Cahuilla Mountain and 20 miles south-southeast of San Jacinto.

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