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WILLIAMSON CREEK. Williamson Creek rises just west of Oak Hill in southeastern Travis County (at 30°15' N, 97°55' W) and runs southeast for eighteen miles, through a variety of business and residential areas, to its mouth on Onion Creek (at 30°11' N, 97°43' W). It crosses flat to rolling prairie surfaced by clay and sandy loam that supports hardwoods, mesquite, cacti, and grasses.

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Handbook of Texas Online, "Williamson Creek," accessed November 17, 2017,

Uploaded on June 15, 2010. Published by the Texas State Historical Association.