Midpeninsula Regional Open Space District preserves are an ideal setting for a wide range of activities. District preserves cover the spectrum from redwood forests and chaparral-covered hillsides to sensitive wetlands along the San Francisco Bay. Visitors will find over 220 miles of trails for hiking, biking, nature study, dog walking, and more. We have many resources to help you better enjoy the great outdoors. Select an option below to learn more.