Missouri State Motocross Championship Series – Round 4 June 20-21, 2026 | Grain Valley Motorsports Park Grain Valley Motorsports Park is proud to host Round 4 of the Missouri State Motocross Championship Series on June 20-21, 2026! Join us for a full weekend of championship motocross action featuring a prepped practice track on Saturday, racing on Sunday, camping, and our exciting Best Whip Contest with cash up for grabs. Friday, June 19 – Early Arrival & Camping Gates Open: 3:00 PM – 10:00 PM Gate Fee: $20 per person Ages 5 & Under: Free Cash Only Primitive camping is available Friday and Saturday nights. Please note there are no hookups and no water available. Saturday, June 20 – Practice Day Gates Open: 7:00 AM – 10:00 PM Prepped Practice: 9:00 AM – 2:00 PM Practice Fee: $40 per rider Best Whip Contest: Immediately Following Practice Cash Purse Up for Grabs! Early Registration Sign-Up: State Race Trailer (Time TBA) Gate Fee: $15 per person Ages 5 & Under: Free Cash Only AMA Membership is NOT required for Saturday practice. Sunday, June 21 – Race Day Gates Open: 6:00 AM Registration Sign-Up: 6:00 AM – 7:30 AM Entry Fee: $45 per entry Riders Meeting: 7:45 AM Practice Begins: 8:00 AM Racing Begins: Immediately Following Practice Gate Fee: $15 per person Ages 5 & Under: Free Cash Only Important Race Information CHEST PROTECTORS ARE REQUIRED ALL WEEKEND FOR RIDERS. NO EXCEPTIONS. Riders will not be permitted on the track without an approved chest protector. This is an AMA-sanctioned event. All riders competing on Sunday must have a current AMA Membership. Come battle for valuable championship points, compete against the region’s top riders, and enjoy an unforgettable weekend of motocross racing at Grain Valley Motorsports Park. We look forward to seeing everyone at Round 4 of the Missouri State Motocross Championship Series!