For 2023 National Classes, Supplemental Rules and Qualifying Processes for the Monster Energy Amateur National Motocross Championship at Loretta Lynn’s, please see the MX Sports WEBSITE.

For Road to Mammoth, King of the West, and Mammoth Motocross Rules and Qualifying Processes, see below:

Rule #1: HAVE FUN!

Motocross is a family sport. We are all here to enjoy our time at the races. 2X Promotions reserves the right to take disciplinary action against any participant or attendee of our events not adhering to AMA, Promoter, or Facility policy and behavior.

All racers are required to possess an AMA Membership to participate in our events. AMA Memberships need to be current and valid, or entries will be disqualified.

Motocross & Supercross Format

At Mammoth Motocross:

Rider must be at the line for the start. You must start your first moto to be able to start your second moto or qualify for the Main at Mammoth Motocross. You cannot skip first moto and ride second moto to qualify. Adjustments on race day may be made to qualifying totals if divisions are not equal. Starting positions on gate for first moto is determined by draw on a first­come basis. Starting position on gate for second moto is determined by first moto finish. Starting position on gate for Final is determined by position from qualifying races and division. If you jump gate at start you will be penalized one lap. You may pack in front of the gate at the finals (no Tools or Farming). You will be disqualified if you pass or ride unsafe during a yellow flag.

Supercross Format:

Racers with more than one division:
Event staff will post the numbers of riders transferring to Main Event. If you place in transfer position from first moto you go directly to Main Event. If not, you ride in a Semi or LCQ and try to qualify for the Main Event. Results in Main Event are final results for this race; all qualifying positions will come from main.

Motocross Format:

Races with only one division of racers will be scored in a two-moto format with the second moto being the tiebreaker. Check your race schedule to determine how your race will be scored. Road to Mammoth qualifiers: You must race 2nd moto to qualify.

Road to Mammoth Qualifiers

Road to Mammoth Qualifiers:

Each racer will only have to qualify once. You may ride as many qualifiers as you wish, but you are only required to qualify once. You must race 2nd moto at the Qualifier to qualify.

Each class has been given a certain percentage of riders that qualify directly into the 2023 Mammoth Motocross Championship. The closing date of qualified entry is TBD. The majority of the entries will come from the qualifiers, there will be a small percentage of open entries available at onTBD. You must ride the final event at Mammoth in the class you qualify in at the qualifier. Entries are non-transferrable and non-refundable. Sandbaggers will not be tolerated and will be removed from qualifying positions.

Once a racer has qualified, qualifying results will be posted on the “I qualified” tab on Select the Class from the drop-down and find your name. The link will gain access to entry to the final event registration when it opens. It’s the racers’ responsibility to enter the correct qualified classes ONLY for the final by the deadline or forfeit qualified position. Racers who enter classes they did not qualify for will be removed, and refunds will not be issued.

Age Classes

Age classes for RTM and Mammoth Motocross:

All Road to Mammoth and Mammoth Motocross Classes follow the AMA National Class/Equipment specifications. Modification of these requirements will deem you disqualified.

Minimum age for mini riders is 5 years old.
All Youth classes, 250C Jr (12-17), and Schoolboy 2 (12-17) B/c are Age based as of age on Jan 1, 2023 for the remainder of the year.
Plus 25 years of age as of day of race final (June 23rd)
30+ years of age as of day of race day final (June 18th)
40+ years of age as of day of race final (June 18th)
50+ years of age as of day of race final (June 18th)
60+ years of age as of day of race final (June 18th)
Ability Level: C Rider-Novice, B Rider- Intermediate, A Rider- /Expert/Pro Pro-Sport

A rider must be 14 yrs of age to ride a 250cc machine in any class.
A rider must be 12 yrs of age to ride a Supermini in any class.
Racers under the age of 18 must have a parent present or a duly-notarized release waiver presented at registration to participate.

Equipment Classes

Equipment classes:

All Road to Mammoth and Mammoth Motocross Classes follow the AMA National Class/Equipment specifications. Modification of these specifications will deem you disqualified.

+25 +30 +40 +50: All size bikes are allowed for the running of these classes.

All Classes are Modified. Limited bike may ride with Mods but there are no limited classes for Road to Mammoth or Mammoth Motocross.

50cc Shootout (61cc 2-stroke max) Engine Modifications open,
Must use original engine type lower end and cylinder ( no stroke)
Single Speed Transmission only
Overall Length limited to 42″ axle to axle,
Suspension Modifications open

Maximum wheel size 12 inches Front 10″ rear

65cc: 59-65cc (Stock Bore and Stroke)
85cc: (9-12yrs)2 Stroke 79-85cc only, No Big Wheels, No 150f (Stock Bore and Stroke).
16″ Rear Max 85cc: Mini Senior 1 (12-14yrs) 79-85cc 2 Stroke/75-150cc 4 Stroke (Stock Bore and Stroke). 16″Rear Max 85cc: Mini Senior 2 (9-14yrs) 79-85cc 2 Stroke/75-150cc 4 Stroke (Stock Bore and Stroke). 16″ Rear Max Supermini 1 (12-15yrs), Supermini 2 (13-16 yrs) (112cc 2 Stroke/150cc 4 Stroke)
16 Rear Max 19 Front Max Women (14yrs+) Amateur: (99cc-250cc) 125-450cc,
College Boy A/B/C (18-24yrs) (122-0pen cc)
Schoolboy 1 (12-17yrs) B/C 86cc-125cc 2 Stroke/75-150cc 4-Stroke. Min Wheels 19 F 16 R
Schoolboy 2 (13-17yrs) B/C 100-250cc 2 Stroke/126-250cc 4-Stroke. Min Wheels 19 F 16 R
Open Classes (144-0pen cc 2 Stroke/250-450 Four Stroke) (21″ Min Front)
125cc B/C (12-17yrs) (21 Min Front)
250cc Class (Up to 250cc-2 Stroke, 250cc 4 stroke)
250cc Open Only (100-250cc 2 Stroke/126-250cc 4 Stroke) (21 Min Front)
450cc Class (250cc-Open cc) (no 125cc or 144cc)

Top 5 random Tear down All mini Classes.

To protest illegal size of motorcycle you must post $500 (Two Stroke) $1000 (Four Stroke) and be in the same class of rider you are protesting. One half of the Dollars goes to the bike owner if it is legal. One half stays with us for administration. Anyone protested for age in Vet or Senior class must produce a valid ID to race officials. You must be in the same class of rider you are protesting. If protesting rider ability level you must produce verification (on-line proof recent result sheets.). You must be in the same class of rider you are protesting.

King of The West

AMA King of the West Title:

AMA King of the West #1 Plate
Special Exclusive Red background to compete with for this years’ Mammoth Motocross
Exclusive First Gate pick at this years’ Mammoth Motocross

Qualifying Rules for KOW:
Qualifying events include the 6 RTM events and the Cal Classic event.

Rider must start 4 race events in the same class to qualify for the #1 Plate.
Points will be taken from the Top 4 Overall finishes in series.
Top 5 riders for each Mammoth class will get that gate pick at the final Mammoth event for the class earned. Must start at least 4 race rounds to get gate pick.

Cal Classic – A select number of classes will not earn points for that years’ King of the West Series. Selected classes will be noted on entry form.

King of the West Series Points will be posted on web site under Results – Series: Road to Mammoth 2023.
It is the rider’s responsibility to ensure that all points are correct.
Any discrepancy can be addressed to
Tie Breakers – If at the end of series riders are tied in points; Rider with the best finish in the last race will get the higher position.

Double Points Events are the Cal Classic and RTM Round 6 Last Chance Qualifier.


2023 Event Schedule

Vet Weekend
Practice – Friday Aug 25th
Vet Racing – Sat Aug 26th – Sun Aug 27th*
**Junior 25+ & All Women race Big Bike Weekend, not Vet Weekend*

Mini Days
Practice – Monday Aug 28th
Racing – Tues Aug 29th – Wed Aug 30th

Big Bike Weekend
Practice – Thurs Aug 31st
Racing – Friday Sept 1st: Open Pro, B, and C; Junior 25+ A/B/C; Schoolboy 1 & 2; and 125/Supermini All Stars
Racing – Saturday Sept 2nd: 250 Pro, B, and C; FMF 2-stroke; Collegeboy; 125cc 12-17 B/C
Racing – Sunday Sept 3rd: 450 Pro, B, and C; Women; 250 B/C Open; 250C Jr 12-17

*Class days are tentative until class capacity is determined*


Qualifying is based on a percentage of each class in accordance with final event capacity and schedule; see below. All RTM races are a 2-moto format. Racers must race 2nd moto to qualify; racers with a 2nd moto DNS will be removed.

Racers who have qualified at previous rounds are removed, and the next position is bumped up. This process is done manually, and will be updated on the “I Qualified” tab within a week post-event. Questions regarding qualifying results can be addressed to

Once a racer has qualified, they must register for the final prior to TBD to secure an entry. Regular Non-Qualifying Open entries will open on TBD to the public to fill the final racing spots available at a first-come-first-serve basis.

RTM Qualifiers per class Rd 1-5 Rd 6 LCQ
Class Name Qualifiers
30 C 10 20
30 B 7 15
30 Pro 5 10
40 C 10 20
40 B 5 10
40 A 5 10
50 C 5 10
50 B 5 10
50 A 5 10
50cc 6-8 5 10
65cc 7-9 10 20
65cc 10-11 10 20
65cc Open 10 20
85cc 9-12 10 20
Mini Senior 1 12-14 10 20
Mini Senior 2 9-14 10 20
Supermini 1 12-15 10 20
Supermini 2 13-16 10 20

Open C

10 20
Open B 10 20
Open Pro 10 20
Schoolboy 2 (13-17) B/C 10 20
Schoolboy 1 (12-17) B/C 5 12
25+ Yrs 5 12
FMF 2-Stroke Challenge 10 20
250cc C 22 30
250cc B 15 30
250cc Pro 10 20
College Boy A/B/C (18-24) 10 20
 125cc (12-17)  5 10
450cc C 14 30
450cc B 10 20
450cc Pro 10 20
Women (12+) 5 10
250 C Jr 12-17 10 20
250 B/C Open 10 20

Monster Energy Mammoth Motocross

Monster Energy Mammoth Motocross
Pit riding: No Pit bikes, No Surrons, No Golf Carts, No Rhinos/UTVs, No excessive speed on Race bikes in pit area.
Dogs: Dogs are not allowed at the Mammoth Motocross; please make accommodations to leave your pet at your lodging or at home.

BIKE WASHING: Washing of bike in the forest is prohibited. There are facilities in the Town of Mammoth Lakes for washing. Enforcement could occur. Absolutely No bike washing at the track.

Background Colors

BACKGROUND COLORS for Mammoth Motocross Event Final:

White Backgrounds/Black Numbers
All C Classes –
65cc 6-9 – White Backgrounds/Black Numbers
85cc 9-12- White Backgrounds/Black Numbers

Black Backgrounds/White Numbers
All B Classes –
65cc10-11- Black Backgrounds/White Numbers

Yellow Backgrounds/Black Numbers
All Pro/A Classes –

30+ A B C
40+ A B C

A – yellow background
B – black background
C – white background

Smoke and Fire Vintage – Your Choice
All 50+ A – Your Choice
All 50+ B – Your Choice
All 50+ C – Your Choice

50cc – Your Choice
65cc Open – Your Choice

Mini Sr 1 12-13 – Your Choice
Mini Sr 2 9-14 Your Choice

Supermini 1,2 – Your Choice
Schoolboy 1,2 – Your Choice
College Boy – Your Choice

Women 12+ – Your Choice

Two Stroke Challenge – Your Choice
+25 A/B/C – Your Choice
125cc – Your Choice
250 BC Open –  Your Choice
250 C Jr – Your Choice
Supermini Allstars – Your Choice