Today, Thursday, May 10, marks the start of elite ultra runner Diane Van Deren’s effort to run across North Carolina, a roughly 1,000-mile journey that will take her along the work-in-progress Mountains-to-Sea Trail from Clingman’s Dome on the Tennessee border to Jockey’s Ridge at the lip of the Atlantic. Her objective: to finish in 21 days, beating the current speed record of 24 days, 3 hours and 50 minutes set last year by Matt Kirk.