Spectacular Bootlegger Canyon Union Pacific’s Potash Turn heads north into Bootlegger Canyon on the afternoon of May 12, 2006. This train normally operates in the morning, so this late afternoon departure is rare. Corona Arch is huge, having an opening that is 105 feet high and 140 feet wide, and reportedly, a local pilot has even flown his plane through the opening! The short 8-car train is led by former Southern Pacific, now HLCX SD40r No. 6336 and UP SD40-2 No. 3285