The stream originates near the Sonoma–Napa county line, about 0.6 miles (1.0 km) north of the northern Bald Mountain summit. It descends first to the west and then to the south, emptying into Sonoma Creek just west of Sugarloaf Ridge State Park.
^U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National MapArchived 2012-03-29 at the Wayback Machine, accessed March 10, 2011