Open Weekend March 20 -22, 2015 Nature Conservancy’s Davis Mountains Preserve will be open for hiking, biking, equestrian, picnics, photography, birding and other outdoor activities from Friday at 8:00 AM until Sunday at 4:00 PM. http://www.nature.org/ourinitiatives/regions/northamerica/unitedstates/texas/events/davis-mountains-preserve-2015-events-schedule.xml