sentences:  In February 2014, the Presidio Trust Board of Directors ultimately decided not to pursue any of the three options for the site.The transformation of the Presidio into a national park has been substantially boosted by the Evelyn and Walter Haas, Jr. Fund, which made a historic gift of $15 million in 2007 to create a world-class network of trails, bikeways, and overlooks, and dramatically expand and renovate the Rob Hill Campground.Camping at the Presidio programs use the site to introduce underserved youth to nature and the outdoors.