Are you ready to compete in the toughest off-road race in the world?

Whether you’re part of the Pit Crew, a Co-Driver, competing in King of the Motos, or taking on the ULTRA4 and Desert Challenges, this guide will walk you through every step of the process to get you onto the lakebed. Follow the instructions below to register to race, secure your race numbers and required licenses.

Competitors Start Here!

Find your team’s groups below and follow the steps to complete your registration!

COMPETITOR FAQ
DRIVERS:
Ensure that registration is completed using the Driver of Record’s name.
1

SECURE YOUR RACE NUMBER

Register your race number on Ultra4USA.com! 

If you have not raced with us or have not confirmed a race number with us in the past 12 months for KOH or Ultra4 USA, use the button to go to Ultra4USA.com and secure your race number.

SECURE YOUR RACE NUMBER
2
REQUIRED FOR ALL DRIVERS

PURCHASE A USAC LICENSE

Licenses must be purchased before arriving at the lakebed and will be verified on site.

  • If you are racing more than one class, select the higher class under the “Race Class” section.
PURCHASE A LICENSE
3
REQUIRED FOR ALL DRIVERS OF RECORD

REGISTER TO RACE

*Purchase includes one General Admission Ticket

You will need:

  • Current USAC license number from Step 2
  • Your class and subclass (if applicable)
  • Medical insurance information
  • Car details (including OEM, motor, tires, wheels, shocks, etc.)
REGISTER TO RACE
4

UPLOAD YOUR W-9 FORM

A new form is required annually for purse payouts.

UPLOAD W-9
Your registration includes: 1 competitor wristband for the Driver of Record, 1 race vehicle pass, 3 vehicle passes (truck/car/UTV/moto), and 1 RV pass.
Note: Additional drivers must follow the co-driver procedures below.
PIT CREWS:
1
REQUIRED FOR ALL PIT CREW MEMBERS

PURCHASE A GENERAL ADMISSION TICKET

Tickets will be verified upon arrival at the lakebed.

PURCHASE A TICKET
2
REQUIRED FOR ALL PIT CREW MEMBERS

PURCHASE A USAC LICENSE

Licenses must be purchased before arriving at the lakebed and will be verified on site.

PURCHASE A LICENSE
Note:  Pit access is limited to eligible team members only, and this will be strictly enforced.
Pit crew must indicate their Driver of Record.
Unauthorized crew will have their pit access revoked and be charged a $50 penalty.
CO-DRIVERS:
1
REQUIRED FOR ALL CO-DRIVERS

PURCHASE A GENERAL ADMISSION TICKET

Tickets will be verified upon arrival at the lakebed.

PURCHASE A TICKET
2
REQUIRED FOR ALL CO-DRIVERS

PURCHASE A USAC LICENSE

Licenses must be purchased before arriving at the lakebed and will be verified on site.

PURCHASE A LICENSE
KING OF THE MOTOS RIDERS:
Ensure that registration is completed using the Rider of Record’s name.
1
REQUIRED FOR ALL RIDERS

JOIN THE AMERICAN MOTORCYCLIST ASSOCIATION

Membership will be verified upon arrival at the lakebed.

JOIN THE AMA
2
REQUIRED FOR ALL RIDERS

REGISTER FOR THE SERIES & REQUEST YOUR NUMBER

REGISTER & REQUEST
3
REQUIRED FOR ALL RIDERS

REGISTER TO RACE

You will need:

  • Current AMA license number from Step 1
  • Your class and subclass (if applicable)
  • Medical insurance information
  • Motorcycle details (including OEM, motor, tires, wheels, shocks, etc.)
REGISTER TO RACE
4

UPLOAD YOUR W-9 FORM

A new form is required annually for purse payouts.

UPLOAD W-9
Your registration includes:  competitor wristband for the Rider of Record, 1 race vehicle pass, 1 vehicle pass (truck/car/UTV/moto), and 1 RV pass.
JEREMY McGRATH HOLE SHOT KING & KING OF THE GRAND PRIX:
1

REGISTRATION OPENING SOON

Registration for Jeremy McGrath Hole Shot & King of the Grand Prix will open in December

Don’t forget to subscribe to all racer communications for the latest updates and important information.

SUBSCRIBE

ADDITIONAL RESOURCES

FIRST TIME COMPETITORS

2027 ROOKIE PROGRAM

Designed to make sure new racers are confident, capable, and connected, this program blends hands-on training, virtual coaching, and direct mentorship.

2027 ROOKIE PROGRAM
VERSION 7.0

ULTRA4 RACING 2027 RULEBOOK

Building, modifying, or maintaining your own race vehicle is exciting.Read and print the Rulebook and reference materials before starting a project or when preparing for tech each year.

RULEBOOK & TECH

2027 KOH SCHEDULE

Want to check out the full series of events? Check out the full breakdown for The King of the Hammers – January 21 – February 6, 2027!

2027 SCHEDULE
2027 KING OF THE HAMMERS CLASS LIST

*Subject to change without notice

ULTRA4 RACING

RACE OF KINGS

  • 4400 Unlimited Class

EVERYMAN CHALLENGE

  • 4500 Modified Class
  • 4600 Stock Class
  • 4800 Legends Class
  • EV

UTV HAMMERS CHAMPIONSHIP

  • Pro Stock NA UTV
  • Pro Stock Turbo UTV
  • Pro Modified UTV
  • Open UTV
  • Sportsman Stock UTV
  • Youth 1000 UTV

KOH KIDS 170RACE

  • Stock
  • Limited
  • Modified

TOYO TIRES DESERT CHALLENGE

PRESENTED BY MONSTER ENERGY

UNLIMITED

  • T1
  • T2 (Spec T1, 7200)
  • B1 Unlimited Buggy (Class 1, 4400)

LIMITED

  • B2 Limited Buggy (C10, 6200)
  • B3 UTV (Pro Stock NA, Pro Stock Turbo, Pro Modified, Open UTV)
  • B4 Vintage Buggy ( 9, 16, 5 5u, 12)
  • T3 4Cyl Motor, Lmt. Suspension (TrophyLite, Baja Lite)
  • T4 Stock (7F, OEM, Jeepspeed)

1400/1500

  • 1400
  • 1500

CLASS 11 SHOWDOWN

  • Class 11

KING OF THE MOTOS

  • Pro (12 yrs and up) 98cc and up
  • Pro Woemn (L) (12 yrs and up) 98 cc and up
  • A (A) (12 yrs and up) 98 cc and up
  • A 30+
  • A 40+
  • A 50+
  • B (B) (12 yrs and up) 98cc and up
  • B 40+
  • Open 4 Stroke
  • C (C) (12 yrs and up) 98cc and up
  • Amateur Women (W) (12 yrs and up) 98cc and up
  • Youth Lites (Y) (12 yrs – 15 yrs) 98cc – 250cc

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