Free things to do in Inner East Bay, San Francisco Bay Area

Cull Canyon Regional Recreation Area

📍 Castro Valley · Inner East Bay

East Bay Regional Park District recreation area in Castro Valley with picnic areas, hiking on the Chabot-to-Garin Regional Trail corridor, and a swim complex currently closed until the 2027 season. Good for picnics and trail walks while swim facilities remain offline.

🕑 Hours vary by season; see the official page

✓ Checked on the official page Nov 3, 2026