The pit area was expanded in 1985 to accommodate extra vehicles and over $100,000 worth of improvements to the speedway were completed by December 1987.
From 1980, Borderline has been the South Australian venue for the Easter Sprintcar Trail (the other tracks used generally being Victorian tracks Premier Speedway in Warrnambool and the Avalon Raceway in Lara) with some of the biggest names in Australian sprintcar racing taking part including multiple Australian champions Garry Rush, George and Brooke Tatnell (NSW), Max Dumesny and Brett Lacey (Vic), as well as Mount Gambier's own Bill Barrows (the current president of the speedway), David Veal and Steven Lines.
Borderline Speedway was awarded the Australian Sprintcar Championship in 1995, the first time the title had been held in South Australia outside of the state capital Adelaide.
With the Kings Challenge running prior to the Classic, the event attracts the best sprintcar drivers from Australia and the United States.
Prior to the series demise in 2000, Borderline also hosted rounds of David Tapp's Australian Speedway Masters Series which saw some of Australia's best Solo riders such as Jason Crump, Leigh Adams, Craig Boyce and Ryan Sullivan take on the world's best including World Champions Sam Ermolenko, Billy Hamill and Greg Hancock (USA), Tony Rickardsson (Sweden), Mark Loram, Simon Wigg and Kelvin Tatum (England).