February 4: Families (6+) can explore Ralph B. Clark Regional Park’s rich fossil history and visit the marine fossil site for hands-on fossil excavation; bring a picnic lunch and stay to enjoy the park afterward. Saturday, 9:30 a.m. – 12:30 p.m.; meet at the amphitheatre. Parking, $5. Buena Park. (714) 973-3170. www.ocparks.com/clarkpark