"The Coyote Hills are grassy knolls overlooking the shoreline of the San Francisco Bay National Wildlife Refuge. Just east of the hills is an extensive freshwater marsh that hosts migratory birds and ducks. The hills stand out majestically in an otherwise flat area along the bay. Before dikes were built at the turn of the century, the tide reached farther inland, making islands of the hills during periods of high water. The hike is easy, along a flat, paved, wheelchair accessible trail. Park activities include hiking, biking, horseback riding, picnicking, and camping. There is a visitor center with Native American and natural history displays. No dogs, horses, or bikes are allowed on the boardwalks in the marsh. There is a small fee."