Pier 58 Playground (Waterfront Park)
✓ Last confirmed for the 2026 season
Where: 401 Alaskan Way, Seattle, WA 98101, Seattle, Washington
When: typically open in warm months (check before visiting)
Hours: typically daylight hours
Cost: free
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On Seattle's rebuilt downtown waterfront, this marine-themed playground for ages 0-12 centers on a 25-foot jellyfish climbing structure with an 18-foot slide, reached by accessible ramps and framed by shade trees and an open plaza over Elliott Bay.