December 9, 2009 > Wintry walk to pounding rock Wintry walk to pounding rock Submitted By East Bay Regional Park District Welcome winter's brisk weather by exploring grassland, oak woodland and riparian habitats, and thousands of years of history, during this leisurely ascent to ridgetop heights. We'll share a potluck lunch at a site where local Ohlone processed food. A 4-1/2 mile loop trail. For ages 10+. Free event. Wintry Walk to A Pounding Rock (Course#22770) Sunday, December 20 10:30 a.m. - 3 p.m. Garin/Dry Creek Regional Park 1320 Garin Ave., Hayward Registration: 1-888-327-2757, option 2, 3 (Free event.) www.ebparks.org