McKinney Falls State Park is near Austin TX. We stayed here in March 2021 while visiting Austin. This park is big and has lots of hiking, bikeable trails, day use areas and camping. You can swim in the river and enjoy the waterfalls. The trails can be rocky in spots and the path to the lower falls is really big rocks. I spent as much time as I could hanging out by the waterfalls and enjoying them from many different viewpoints. I did not swim, but there were some kids and brave parents swimming in the rather cold water.