About Us - Hammerking, Ultra4 and King of the Hammers!

Ultra4 Racing is the official website of Hammerking Productions. The founders of Hammerking are the force behind the National race series, Ultra4 Racing, and the toughest one-day, off-road race on the planet, King of The Hammers.

King of The Hammers takes place each year the end of January into the first week of February, on public lands in Johnson Valley, California. 

The race has evolved from 12 teams racing for bragging rights and a case of beer, to more than 530 teams competing before more than 80,000 fans in person and 2 million watching online. Due to the incredible success of King of the Hammers, Hammerking Productions created the Ultra4 Racing Series. In 2022, Ultra4 is slated to hold 11 races coast-to-coast, King of the Hammers being the year-opener. 

Each National Ultra4 series race is a qualifier for the King of The Hammers race for the upcoming year. Hammerking was the establishing series of the Unlimited class, as we know them the Ultra4 or 4400 race car. The defining characteristics of this class is the sturdy 4-wheel drive and unlimited builds. These cars come in all shapes and sizes, are capable of speeds over 100+ mph and contain gear ratios as low as 100 to 1 for technical rock crawling. Additional classes in Ultra 4 include the Every Man’s Challenge class combining 4600 Stock, 4500 Modified and 4800 Legend’s cars. The fastest growing class is the 4900 UTV class and newest is the Electric Vehicle (EV) class.  

Ultra4 is a series drivers can showcase their unique capabilities, whether the driver has dreams of building a UTV into a racecar in their garage tinkering during free time, or with full factory-backed support. The series challenges drivers to compete in a wide variety of terrain from endurance desert racing, competition-style rock crawls, short course racing and more.  

Currently Ultra4  has races in the US, Europe, Australia and an exhibition in China. These races take place on both public lands and in private property around the world. 

Hammerking Productions has also produced 8 full-length feature films chronicling King of the Hammers races. We manage our own live production which is seen every year by millions of followers online. These award winning movies have helped shine a spotlight on this new form of racing throughout the world.  If you would like to know more about Hammerking Productions, Ultra4, or King of the Hammers, please visit our Contact page and reach out to the person most suited to assist you with your inquiry.