Sport American speedway royalty enjoy short-lived Kings Challenge 28/01/2020 FacebookTwitterEmail SPEEDWAY ROYALTY: Doug and Justin Clark attended the Kings Challenge Thursday night at the Borderline Speedway, with the chance to wave the flags in a couple of heat races before the rain came. Picture: TREVOR JACKSON IT is a long way from the streets of Sioux Falls to the Limestone Coast region of Mount Gambier, but […] Subscribe or Login to see the rest of the content. Username Password Remember Me Forgot Password