About Us

About US

Hammerking and King of the Hammers

King of the Hammers is the official website of Hammerking Productions. The founders of Hammerking are the force that founded the National race series, Ultra4 Racing, and the toughest week of one-day, off-road races in the world, King of The Hammers.

King of The Hammers takes place the beginning of the year 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 viewers online. Due to the incredible success of King of the Hammers, Hammerking Productions created the Ultra4Racing Series, which has grown Internationally.

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 are 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 which encompasses 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. Motos and a Rock Bouncer’s Shootout are also held at KOH.

Ultra4 is a series drivers can showcase their unique capabilities, whether the driver has dreams of building a racecar in their garage during free time, or with 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 New Zealand. These races take place on both public lands and on private property around the world.

Hammerking Productions has produced eight, full-length feature films chronicling King of the Hammers races, as well as the KOH live show yearly with all production in-house. These award-winning movies have helped shine a spotlight on racing discipline around the world.


For more information about Hammerking Productions, Ultra4, or King of the Hammers, please visit our social media channels or Contact Us.