SOUTH ONION CREEK
SOUTH ONION CREEK. South Onion Creek rises 1½ miles northeast of Mount Sharp in west central Hays County (at 30°07' N, 98°14' W). Intermittent in its upper reaches, the stream follows a generally easterly course for 14½ miles to its mouth on Onion Creek, 3½ miles south of Dripping Springs (at 30°09' N, 98°05' W). Live oak and Ashe juniper trees are common to the primarily limestone and chalk soils found along South Onion Creek.