Hurricane Harbor (Six Flags St. Louis)
✓ Last confirmed for the 2026 season
Where: Hurricane Harbor (Six Flags St. Louis), Eureka, Missouri
Season: seasonal (summer)
Hours: typically daylight hours
Cost: free
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The water park inside Six Flags St. Louis features the 132-foot Tornado tunnel slide, the Big Kahuna family raft ride, and Adventure Cove, an interactive kids zone with a giant dumping bucket and pirate ship. Entry requires Six Flags admission plus the water park charge.
What's on site. OpenStreetMap maps toilets on site, drinking water, playground alongside, parking at this location.
When to go. Peak summer highs in Eureka average 87°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 0 other pads within 5 miles and 5 within 15. These are the ones worth the drive — ranked by shade, toilets and cost first, then by how close they are: