KEYSER CREEK. Keyser Creek rises three miles north of Loyal Valley in southeastern Mason County (at 30°36' N, 99°00' W) and runs northeast for 13½ miles to its mouth on the Llano River, just west of the Llano county line in Mason County (at 30°42' N, 98°58' W). Rising in the limestone hills on the eastern edge of the Edwards Plateau, the creek crosses steep, rolling, and flat terrain surfaced by shallow and stony to deep sandy and clayey loams that support scrub brush, grasses, and open stands of live oak and mesquite. Keyser Creek is possibly named after Henry Keyser, one of the early German settlers who moved to what became the Loyal Valley community around 1858. The Keyser cemetery is located near the creek.
Mason County News, Centennial Edition, June 19, 1958.