Randy Slawson Wins The World’s Hardest One Day Off-Road Race & Takes Home His Third Crown February 8, 2020 (Hammertown, CA)- King of the Hammers has a reputation as the most difficult one day off-road race in the world, pushing team and machine to their breaking point, and beyond. Attrition in 2021 was as high as… Continue reading 2021 OPTIMA Batteries King of the Hammers Results Story