ONION CREEK (BLANCO COUNTY)
ONION CREEK (Blanco County). Onion Creek rises twelve miles southeast of Johnson City in eastern Blanco County (at 30°08' N, 98°17' W) and runs northeast for sixty miles to its mouth on the Colorado River, two miles northwest of Garfield in Travis County (at 30°12' N, 97°35' W). Along its course it passes near Dripping Springs, Driftwood, and Buda in Hays County and Onion Creek and Bluff Springs communities in southern Travis County. The terrain near the creek is characterized by steep slopes and benches in the upper and middle reaches and is generally flat to rolling in the lower reaches. Shallow clay loams to deeper sand and clay support juniper, live oak, mesquite, and grasses. Onion Creek provides the falls for McKinney Falls State Park and is suitable for recreational use when the water is high.