Onion Creek (Texas)

30°08′25″N 97°46′52″W / 30.1403°N 97.7811°W / 30.1403; -97.7811

Onion Creek (Texas)
Onion Creek in McKinney Falls State Park
Location
CountryUnited States
Physical characteristics
Source 
  locationDripping Springs, Texas
Mouth 
  location
Colorado River
  elevation
374 feet (114 m)
Length79 miles (127 km)
Basin sizeOnion Creek Watershed

Onion Creek is a small tributary stream of the Colorado River in Texas. It begins 12 mi (19 km) southeast of Johnson City, Blanco County, Texas, and flows approximately 79 mi (127 km) eastward into the Colorado River, 2 mi (3.2 km) northwest of Garfield in Travis County, Texas. While areas surrounding the creek's origin in Blanco County are primarily rural, areas closer to its mouth in Travis County run through Austin and are urban and industrial. Passing near Dripping Springs, Driftwood, and Onion Creek, Onion Creek is the source of the waterfalls in McKinney Falls State Park. Onion Creek's watershed spans an area of 211 sq mi (550 km2).