The easy accessibility and comfort of these stadium venues helped supercross surpass off-road motocross as a spectator attraction in the United States by the late 1970s.

[5] The 1972 race was held at Daytona International Speedway on a constructed track on the grass surface between the main grandstand and the pit lane.

In the 1990s, MTEG went bankrupt and Super Sports sold its business to Pace, which became the primary AMA Supercross promoter (with Daytona continuing to be the one holdout).

The live events division of Clear Channel was split off as Live Nation in 2005, and the motorsports division was sold to Feld Entertainment in 2008, which currently promotes the championship except for the Daytona round, which is promoted by NASCAR Holdings (the owner of Daytona International Speedway).

By 1986, the schedule was compacted to a January to June schedule, and in 1998, the series adopted its present format, starting in early January and ending in early May, with races weekly except for Easter weekend (a traditional off-week for motorsport in the United States).

In 2000, the present calendar was adopted with the season starting in the Los Angeles area on the Saturday after the first Thursday of January (between January 3–9) and ending with an early May race in Las Vegas, after which the AMA Motocross Championship "outdoor season" begins.

Starting in 2013, the AMA and Feld Motor Sports returned to the traditional nomenclature, based on four-stroke engines: 450cc (known as "MX1" in Europe), and 250cc (also known as "MX2").

From 2011-2019, the final race of the season, known as the Monster Energy Cup for sponsorship reasons, is held at Sam Boyd Stadium in Las Vegas.

Ryan Villopoto won the purse at the inaugural event in 2011, as did Marvin Musquin in the 2017 edition,[7] and Eli Tomac in the 2018 race.

Beginning with Anaheim 1, the series holds two of its first five races at Angel Stadium before it heads eastwards.

The other 22 riders are relegated to the consolation race, known as the Last Chance Qualifier, which is five minutes plus one lap, with the top four advancing to the final.

The rules are similar to the Monster Energy Cup individual scoring will determine the overall race winner.

Starting in 2018, the combined East-West Shootout will also be held in the middle of the season, at the Indianapolis round.