A former military airfield, Crissy Field transformed into a beloved national park site in 2001. This recreational paradise welcomes visitors and locals with its breathtaking San Francisco Bay views, easy hiking, beaches and picnic areas, and wild open spaces. Locals and visitors run, stroll, and cycle along the Bay Trail to the iconic Golden Gate Bridge. And the former airplane hangars and warehouses are home to recreational uses, from a rock climbing gym to a trampoline house. History buffs are served up a fascinating story from the past at the Military Intelligence Service Historic Learning Center.