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SAN YGNACIO CREEK. San Ygnacio Creek rises eleven miles northeast of Laredo in central Webb County (at 27°40' N, 99°20' W) and runs southwest for twelve miles to its mouth on Lake Casa Blanca, two miles northeast of Laredo (at 27°34' N, 99°25' W). Low rolling and flat terrain in the area has locally shallow depressions and is surfaced by clay and sandy loams that support grasses, mesquite, chaparral, and water-tolerant hardwoods.


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

"SAN YGNACIO CREEK," Handbook of Texas Online (, accessed October 10, 2015. Uploaded on June 15, 2010. Published by the Texas State Historical Association.