Round 7 – Dynamite Grand Prix – Preston, ID

4363 S State St Preston

From Friday, August 21 2026 until Sunday, August 23 2026

Round 7

Hosting Club: Grassroots Off-Road

Dates: August 28-30, 2026

Location: Cache Valley MX Park

Address: 4363 S State St, Preston, ID 83263

*Pays National, WORCS, SIDRA, UMORA, & Grassroots Off-Road Points

FRIDAY MX PRACTICE

Friday MX Practice will be split between the Main and Vet tracks and will be divided by skill level. The practice order will be released the Monday of the event. Cost is $35 per rider and runs from 8am – 2pm. Practice admission can be purchased at the entrance gate.

 

Click To Download:

Track Preview:

Gate Times:

Thursday: 3pm – 10pm

Friday: 6am – 10pm

Saturday: 6am – 10pm

Sunday: 6am – 4pm

Gate Fees (per person):

Adult 13+: $10/day

Youth 6-12 – $5/day

Child 5-: FREE

Camping: $20/night

Parking: $10/day (N/A if camping)

Gate Fees Accept: Cash, Check, & Card/Apple Pay/Tap (+3% fee)

Sign Ups:

Discounted Pre-Registration Closes Thursday, Aug. 20 at 5pm PST. Sign Up HERE.

On-Site Registration Accepts: Cash, Check, & Card/Apple Pay/Tap (+3% fee)

Friday: 5pm – 9pm

Saturday: 6am – 3pm

Sunday: 6am – 2pm

Entry Fees (Pre/Post):

1st Race or Class: $55/$65

Each Additional Class: $48/$58

Youth: $40/$45

Unclassified: $35

Pro Classes: $140

Event Details

Race Referee:

 

Youth

Super Mini: 12–16 (79–112cc 2 Stroke or 75–150cc 4 Stroke)

Girls Sr. 12-16: (79–112cc 2 Stroke or 75–150cc 4 Stroke)

Girls Jr. 9-12: (59-85cc 2 Stroke or 75–125cc 4 Stroke)

85cc Sr.12-15: (66–85cc 2 Stroke or 75–125cc 4 Stroke, Max Front Wheel 17”)

85cc Jr. 7–11: (66–85cc 2 Stroke or 75–125cc 4 Stroke, Max Front Wheel 17”)

65cc 10–11: (59–65cc 2 Stroke or 59-112cc 4 Stroke)

65cc 7–9: (59–65cc 2 Stroke or 59–112cc 4 Stroke)

Peewee Jr. 4-6: (10” Front Wheel, 0-51cc 2 & 4 Stroke)

Peewee Sr. 7-8: (12” Front Wheel, 0-51cc 2 & 4 Stroke)

eMicro 4-8: (12” Front Wheel)

Skill Levels

Adult

Pro/AA, Expert, Intermediate, Novice

Youth

Advanced, Novice, Beginner

Misc. Info

*Riders Under 18 Must Be Present At Sign Up And Have BOTH Parents At Sign Ups OR An AMA Annual Release And One Parent (Or A Guardian With A Notarized Statement}. *

*Course Mileage Is Approximately 7 Miles. Minimum 45 Minute Class Races.

*All Pre-Entries Must Show AMA & D-37 Cards At Sign Ups*

*Everyone Must Sign Gate Release. We Reserve The Right To Refuse Service.*

*Riders Must Run Official District Approved Numbers, Fonts, and Backgrounds*

*Transponders Available At Sign Ups For $10*

– Entry Fees Include $1.00/Race For District 37 Legal Defense Fund. Medical Insurance Not Provided.

– Pee-Wee Ride: Up To 10 Years Old (50cc Bikes, NO Quads) On A Modified Course.

– No Riders Under 12 Years Old In Any Class Except “Youth Races”

– Quad Riders Must Be 16 Years Of Age Or Older. NO 3 Wheelers

– D-37 “Mini”: 85cc, Age 12–16 Race The Full Course.

– Classes Determined By Engine Size

– NO PIT RIDING/BIKES!

– NO FIREWORKS.

PIT VEHICLE RULES

– 5mph Speed Limit

– 10pm Curfew

– NO Passengers On Motorcycles

– Helmets REQUIRED On Motorcycles

– LIMITED Four Wheel Passengers

– Bicycles/eBicycles Permitted – MUST HAVE PEDALS (Surrons/Segways/eBikes with throttles prohibited)

Click To Download: 2026 NGPC FLYER Rules Odd