Celebrate 50 years of science-based public land preservation, restoration and public enjoyment with the Midpeninsula Regional Open Space District at this free, family-friendly festival in Ravenswood Open Space Preserve and Cooley Landing in East Palo Alto. Explore the newest segment of the San Francisco Bay Trail, including boardwalks with interpretive signs along the bay wetlands. The day’s events include a nature-themed scavenger hunt, plant and animal exhibits, live music, food and fun for all ages.