Pigs over Cuesta By Angela Cotey | April 20, 2019 | Last updated on August 8, 2025 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates A Southern Pacific piggyback train of modified conventional flatcars with company trailers negotiates Cuesta Grade above San Luis Obispo, Calif., in June 1957. Robert Hale photo