Thunder Valley Motocross Park, situated in the Denver suburb of Lakewood, is Colorado's premier motocross destination. Most famously, it's the home of the Colorado National, a stop on the AMA Pro Motocross Championship tour. The track’s location, high in the foothills at over 6,000 feet, presents a unique challenge. Expect riders to adjust their bike settings to compensate for the reduced air density, and don’t be surprised if even the fittest athletes struggle with fatigue. Besides the National, Thunder Valley hosts various spectator events and regularly scheduled practice days open to riders of all skill levels. If you’re planning a trip, keep in mind that conditions at altitude can change rapidly. Even in summer, be prepared for cooler temperatures and the possibility of afternoon thunderstorms, especially if you're coming for the National. The park's layout is designed for large crowds, but arriving early for major events is always a good idea to secure a prime viewing spot. Whether you’re a seasoned racer looking to test your mettle against the pros on a demanding track, or a fan eager to witness top-tier motocross action in a stunning setting, Thunder Valley offers a memorable experience.
Watch: Thunder Valley Motocross Park
Know Before You Go
- Open practice days
- Most MX parks run open practice on weekends for $25-50. Sign in at the gate, sign a waiver, and ride your allotted moto groups (typically 30 min on, 30 off).
- Required gear
- Helmet (DOT or Snell M-rated), goggles, gloves, chest protector, knee/shin guards, boots, and a full-sleeve jersey. Most tracks won't let you ride without all of it.
- Class structure
- Tracks separate riders by bike size (50cc / 65cc / 85cc / 250cc / 450cc) and by skill (beginner / novice / intermediate / pro). Sessions rotate through the day.
- Track conditions
- Tracks get watered before sessions and groomed between motos. Soft loam in the morning hardens into ruts by afternoon — adjust suspension and tire pressure.