A visit to the Madrona Marsh Preserve is truly a unique experience. Come and explore one of the last remaining vernal marshes in Southern California. The Madrona Marsh Preserve & Nature Center are open Tuesday - Sunday, 10 am - 5 pm. We are located at 3201 Plaza del Amo, in Torrance. The entrance gate to the Preserve is directly across the street from the Nature Center, where there's plenty of parking available.