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. […]

Winter 4x4 Jamboree - 2025 Wednesday, January 15 - Saturday, January 18, 2025 We invite you to join us for the Winter 4x4 Jamboree held in Hurricane/St. George, Utah, (2 hours from Las Vegas)! This spectacular event features world-class rock crawling combined with gorgeous views of Zion National Park, Pine Valley Mountain, Sand Hollow Reservoir and more. We offer more that 35 different trails in and around the spectacular Southwestern Utah area. The Winter 4x4 Jamboree is a non-competitive trail run event for high clearance 4x4 vehicles where groups of participants are led on rated trails by experienced trail leaders and helpers. Trails are rated on a 10-point scale, where a rating of 1 would be for graded roads that may be easily traveled by most cars and a rating of 10 is for purpose-built vehicles (buggies) with sophisticated suspensions and drivetrains operated by expert drivers.

Join us to have the most fun you can have in 4-wheel drive! Come for one day or the whole week! This is one event you are sure to create a lot of memories and new friendships.  The Monster Energy TRAIL HERO Powered by Greater Zion, is a family orientated off-roading event that takes place this September 30th - October 5th, two hours north of Las Vegas in the beautiful Sand Hollow State Park (Utah). Trail Hero’s off-roading event focuses on trail riding and rock crawling across amazing landscapes with large mountainscape backdrops.