Ultra4 Racing is an off-road motorsport that combines elements of rock crawling and desert racing. Competitors navigate challenging terrains, including rocky trails and sandy dunes, using specially designed vehicles that can handle extreme conditions. Races often take place over long distances, testing both driver skill and vehicle durability. The sport originated in the early 2000s with the King of the Hammers event in Johnson Valley, California. It has since grown in popularity, attracting teams and fans from around the world. Races feature various classes of vehicles, allowing for a diverse range of competitors and showcasing innovative engineering.