Many miss an opportunity to experience the coastal scrub and grassland communities of this 64-acre park. Similar to the Marin Headlands, Twin Peaks gives us an idea of how San Francisco’s hills and peaks looked before grazing, and then development changed them forever. The vegetation is primarily a mix of grassland and coastal scrub. Expect strong winds as you hike among plants such as coyote brush, lizard tail, pearly everlasting, and lupine. The endangered Mission Blue Butterfly has adapted to the strong winds and flies low to the ground from lupine to lupine. Native plants provide habitat for brush-nesting birds like the white-crowned sparrow and animals such as brush rabbits and coyotes.