O'Fallon Park Spray Pool (Cornerstone Playground)
✓ Last confirmed for the 2025 season · confirmed against the parks department
Where: 1955 Adelaide Ave, St. Louis, Missouri
Season: seasonal (summer)
Hours: 6 a.m.-10 p.m.
Cost: free
zero-depthplayground-nearbypublic-park
The spray pool sits beside the Cornerstone Playground in one of north St. Louis's big historic parks. It appears on the city's official list of spray and wading pools, so water features are maintained by the parks department.
When to go. Peak summer highs in St. Louis average 88°F — warm enough for a splash pad through most of the season without being punishing at midday.
If this one's closed or packed
Splash pads close for maintenance, run short seasons and fill up on hot weekends. There are 9 other pads within 5 miles and 30 within 15. These are the ones worth the drive — ranked by shade, toilets and cost first, then by how close they are: