Lower McKinney Falls provides access to Onion Creek via a short 700-foot walk from a dedicated parking lot, making it an easily accessible entry point for swimming and creek exploration.

The area features a wide 15-foot limestone bench where Onion Creek drops over exposed bedrock, creating natural pools suitable for swimming, though water quality can be questionable after heavy rains due to storm runoff.

Day-use passes are $6, and the park is open 8 a. m. to 10 p. m. daily with restroom facilities available nearby.