Dirt Track Racing Friday Nights at 7:30 at Murray County Speedway in Slayton, MN Starting in May and ending in August. For financial reasons Murray County Speedway has moved down to IMCA Stock Cars, but watch for our new 32X IMCA Stock Car in 2011 running some weeks in Slayton and Jackson. Watch our powerful USRA Stock Car in Worthington Sunday Nights at 6:00pm.