Beacon Mountain at Jefferson Park
✓ Last confirmed for the 2026 season
Where: 3801 Beacon Ave S, Seattle, WA 98108, Seattle, Washington
When: typically open in warm months (check before visiting)
Hours: typically daylight hours
Cost: free
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Seattle's sixth-largest park crowns Beacon Hill with the Beacon Mountain play area, a spray park, a skate park and sweeping views of the Duwamish River and Olympic Mountains. Olmsted-inspired paths connect the playground to the community center and the Bill Wright Golf Complex.