Austin Creek is a 16.0-mile-long southward-flowing stream in the mountains of western Sonoma County, California which empties into the Russian River about 4 miles from the Pacific Ocean. The creek originates in an isolated area known as The Cedars, about 13 miles west of Healdsburg, California. It flows south past Layton Mine into a woode…Austin Creek is a 16.0-mile-long southward-flowing stream in the mountains of western Sonoma County, California which empties into the Russian River about 4 miles from the Pacific Ocean. The creek originates in an isolated area known as The Cedars, about 13 miles west of Healdsburg, California. It flows south past Layton Mine into a wooded canyon, where it joins King Ridge Road just above its confluence with Bearpen Creek. It parallels King Ridge Road to the town of Cazadero and continues south through confluences with East Austin Creek and Kidd Creek. It flows under State Route 116 at milepost 4.93 and enters the Russian River about 1 mile north of the town of Duncans Mills.