250 years ago, explorer Juan Bautista de Anza arrived with an expeditionary party on the peninsula that was to become San Francisco. To mark this significant occasion, the Presidio Historical Association, with the support of the San Francisco Historical Society, is honored to present, on the exact date of the Presidio's own 250th anniversary, the world premiere of Anza 250: A Documentary Film. This feature chronicles Professor Luis Valle as he retraces Anza’s journey, traveling 1,200 miles—by bike—along the expedition's original route from present-day Sonora, Mexico, to San Francisco. Learn more about his experience along the way, bringing historical and cultural context to Anza's arrival and what it wrought, a true world-changing moment in time.