Lower McKinney Falls is a waterfall on Onion Creek in Travis County, Texas, in the Texas Blackland Prairies region, with a total height of about 8 feet. It lies about 5.2 miles northeast of Onion Creek and roughly 5.6 miles south of Austin as the crow flies.
At 8 feet it is on the modest side for Texas, where the typical waterfall with a recorded height stands around 32.5 feet; it ranks 25th of 34.
The Texas Blackland Prairies are gently rolling former tallgrass prairie on dark clay soils, now mostly farmed and urbanized, with few waterfalls. Onion Creek carries 3 recorded waterfalls, and Lower McKinney Falls is the tallest of them.
There are 9 recorded waterfalls in Travis County. Upper McKinney Falls, 8 feet high, is under a mile away. Twin Falls, is about 6.9 miles away. Sculpture Falls, is about 7.9 miles away.
Lower McKinney Falls is located at 30.1885° N, 97.7209° W. The listing is based on the World Waterfall Database, one of the sources compiled by the U.S. Geological Survey in its inventory of waterfalls and rapids of the conterminous United States. The creek name is confirmed against the federal Geographic Names Information System. The position was verified on aerial imagery. Details on trails, parking and access have not been documented for this waterfall yet.