Run amok! It’s the Caravanniversary, celebrating 30 years of the Headlands Center for the Arts, a former Army-barracks-turned-artist-residence space. For one giant, free day, there will be a galore of artist projects, games, bike and surf activities, guided hikes, musical entertainment and activities for everyone. Test your agility on an art obstacle course, and look up to the sky for a kite show. A sampling of food trucks can satisfy any picky eater, and at the Beer Garden, drinkers can hand-choose their bottles. Come one, come all on Saturday, Sept. 15, to the Fort Barry Parade Grounds. 944 Simmonds Road, Sausalito. Noon—5pm. Free.