Drivers Start Here

 
To register:
If you are a new driver needing a number for an Ultra4 USA series race, click here to search for an unused number. Number selection and registration is NOT YET OPEN FOR KING OF THE HAMMERS 2023. 
*If the number is in use, it may not be duplicated, regardless of class

Create or update your Ultra4/King of the Hammers Driver Profile here

Purchase your USAC Competition License here

Register for the race here. 

Don't forget, first time's on us! If it's your first race with Ultra4 USA, your race entry is covered (exludes Visions, Legends of the Falls)! King of the Hammers race does not qualify for this promotion. 
Ultra4 USA has the right to change, cancel or modifiy this promotion at anytime, with no notice.

For King of the Hammers questions (other than numbering), please email [email protected] (border crossings, registration, general racer topics, etc.). 
  

ULTRA4 Rulebook 

Building your own ULTRA4, Stock Modified, Stock, Legends, or UTV? Read the rules before you start your build. All safety rules must be followed by all classes.

Download the ULTRA4 Rule Book. (MAKE SURE TO DOWNLOAD THE UPDATED BULLETIN BELOW ALSO) – Updated 12/21/2020
2021 Bulletin updated 2021.2

Download the document “How to pass Ultra4 Chassis and Tech Inspection”

Ultra4 Chassis & Tech Sheet can be viewed here.

Should you have specific technical questions, please email our tech inspector at [email protected].

Full and pre-tech are available BY APPOINTMENT at the following locations. Check with the location on time availability and pricing. The $100 tech fee during registration stands for time on the Lake Bed. Teching ahead of time is a convenience for our racers and not mandatory. 

CLICK HERE FOR A LIST OF PRE-TECH LOCATIONS.


Important Info to know before racing with us.

Every ULTRA4 4400 race is a qualifying event with the top 10 non-qualified drivers from each event  (20 from KOH) earning their chance to compete in next year's King of the Hammers race.
 
HANS Devices
ULTRA4 is requiring SFI Rated Head and Neck Restraints for all Classes. Please click here for a list of SFI approved devices. Drivers with any questions regarding this requirement can email [email protected]
USAC Insurance
USAC Insurance is required for ALL classes. Please visit www.ultra4license.com to pay for your insurance. An annual license covers all races in a calendar year plus your tech fee. If you sign up for a single use license, you will owe a tech fee at your first race.