Colorado

The biggest indoor dirt bike series in the world: seventeen Saturday nights in NFL stadiums from Anaheim in January to the Salt Lake City finale in May. The 250SX class splits into East and West regions that meet only at the Showdown.

America's outdoor national series: eleven Saturdays of two-moto racing on the toughest tracks in the country, from Fox Raceway in California to the Ironman finale in Indiana. Feeds into the SuperMotocross playoffs.

The national, top-tier arenacross championship in North America, promoted by AX Promotions under AMA sanction and recognized by FIM North America, with rounds across the US and Canada each winter.

The biggest amateur race in the world, and the one every American pro has ridden. Six days at Loretta Lynn's Ranch in Tennessee, 1,500+ riders across 36 classes, all of whom earned their spot through a nationwide qualifying process.

Club-tier small-bike (pit bike / mini-bike class) outdoor motocross series run by Black Diamond Promotions on its own dedicated site (coloradopitbike.com), presented by FactoryMinibikes.com. Requires a separate series membership plus per-round race-day sign-up. Runs at Colorado Front Range venues, IMI Motorsports (Dacono), Arapahoe County Fairgrounds, Jeffco (Jefferson County) Fairgrounds, Douglas County Fairgrounds and Colorado National Speedway, several of which also host Black Diamond Promotions' full-size supercross rounds and RMRA's amateur SX series on separate dates. Separate from the RMRA MX/SX series: different operator, different site, no shared branding.

5-round 2026 club motocross points series at Megawatt Moto Complex in Craig, CO, run by the Northwest Colorado Trails Association.

Single-venue small-bike (mini-moto class) amateur motocross series run by Black Diamond Promotions at its own dedicated "Black Diamond MX" track in Hudson, CO, tagline "Where Future Champions Race." Distinct from the Colorado Pit Bike Series (different site section, single fixed venue vs. Pit Bike's rotating Front Range venues) and from RMRA MX/SX (different operator/venue).

Colorado's leading amateur/club outdoor motocross points series, run by the nonprofit Rocky Mountain Riders Association across Front Range and Colorado Springs-area tracks plus one round in Cheyenne, WY. The season also carries a double-points championship finale (Sep 27, 2026) whose venue has not been announced. Shares its home track (Thunder Valley MX Park) with the AMA Pro Motocross national round, but on different weekends.

Colorado's amateur/club indoor supercross points series, run by the nonprofit Rocky Mountain Riders Association at Front Range fairgrounds arenas plus one round in Raton, NM. The Round 2 venue is billed only as "Southeast County Fairgrounds", most likely the Southeast Weld County Fairgrounds in Keenesburg. Shares no weekend with the AMA Supercross Denver round or the AMA Pro Motocross Thunder Valley round, both explicitly marked 'non-RMRA' on RMRA's own poster.

Not-for-profit, AMA-chartered vintage motocross club racing classic machines, 1970s-80s bikes (Bultacos, Maicos, Elsinores) through 90s two-strokes and modern bikes, at tracks up and down Colorado's Front Range and into western Nebraska.