Mountain Lake Park Playground
✓ Last confirmed for the 2024 season
Where: 1 11th Avenue, San Francisco, California
When: typically open in warm months (check before visiting)
Hours: Park hours 5 a.m. to midnight; restrooms 8 a.m. to 8 p.m. spring/summer
Cost: free
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This lakeside park just south of the Presidio has a sand-floor playground where under-threes get their own self-contained gated toddler area, while big kids scale a climbing wall to reach the concrete slide or tackle the rope structure overlooking the lake. Tennis courts, a fitness circuit, and a covered picnic pavilion round out the site.