They offer docent-led walking tours, by advance reservation only, on Monday through Thursday mornings. Each tour includes an overview of the water reclamation process. Evening tours are offered during the Summer. The Garden is also available for self-guided tours Monday through Thursday from 11 a.m. until 4 p.m., and Sunday from 10 a.m. until 4 p.m. (the last gate entry each day is at 3:15 p.m.). Closed to the public if it rains within 24-hours of opening time and during open hours. Please call on the day you wish to visit to make sure the Garden is open.