TWELVEMILE CREEK (Mason County). Twelvemile Creek, a spring-fed stream formerly known as Herman Creek, rises 1½ miles northwest of Fly Gap in eastern Mason County (at 30° 49' N, 99°05' W) and runs southeast for six miles to its mouth on the Llano River, two miles south of State Highway 29 (at 30°42' N, 99°01' W). Rising in limestone hills on the eastern edge of the Edwards Plateau, the creek crosses an area of the Llano basin characterized by low rolling to flat terrain and soils consisting chiefly of deep to shallow sandy and clayey loams. Vegetation consists primarily of scrub brush, grasses, and open stands of live oak and mesquite. The creek flows through sandy beds as it nears its mouth.

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The following, adapted from the Chicago Manual of Style, 15th edition, is the preferred citation for this article.

Handbook of Texas Online, "TWELVEMILE CREEK (MASON COUNTY)," accessed January 17, 2019,

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

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