Join us at the Mountain Theater on Mt. Tamalpais to celebrate Earth Day though a variety of activities from morning to night time! Give back to Mt. Tamalpais by joining a service project, followed by a lunch for our volunteers. We'll be improving our trails, working to maintain the historic Mountain Theater, and pulling invasive plants that threaten the mountain's rich biodiversity. After the event, we invite you to also join the Friends of Mt. Tam's mid-day wildflower hike and the first Astronomy Program of the year after the sun sets. For more information and to register go to www.OneTam.org/earthday.