Rock'N River Water Park
✓ Last confirmed for the 2026 season · confirmed against the parks department
Where: 3300 E. Palm Valley Blvd., Round Rock, Texas
Season: Memorial Day - Labor Day
Hours: Varies by week; check roundrocktexas.gov/river
Cost: $6-$20
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Round Rock's municipal water park in Old Settlers Park combines a 51-feature sprayground with slides, a climbing-wall deep area, and a brand-new Action River that nearly doubled the park for 2026. Twilight entry in the last two hours runs about half price.
What's on site. OpenStreetMap maps parking at this location. No public toilets are mapped here — worth knowing before you commit to an afternoon.
When to go. Peak summer highs in Round Rock average 97°F. Mornings and late afternoons are far more comfortable than the middle of the day, and shade is worth planning around.
If this one's closed or packed
Splash pads close for maintenance, run short seasons and fill up on hot weekends. There are 2 other pads within 5 miles and 15 within 15. These are the ones worth the drive — ranked by shade, toilets and cost first, then by how close they are: