The AMA Supercross Championship is an American motorcycle racing series. Founded by the American Motorcyclist Association (AMA) in 1974, the AMA Supercross Championship races are held from January through early May. Supercross is a variant of motocross which involves off-road motorcycles on a constructed dirt track consisting of steep jumps and obstacles; the tracks are usually constructed inside a sports stadium. 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.
Ryan Villopoto is an American former professional motocross and supercross racer who competed in the AMA Motocross Championships from 2005 to 2014; a four-time 450cc AMA Supercross Champion, a two-time 450cc AMA Motocross Champion, a three-time 250cc AMA Motocross Champion & a one-time 250cc West Supercross Champion. He was also a member of the winning USA team at the 2006, 2007, 2008 & 2011 Motocross Des Nations.
The AMA Motocross Championship (commercially known as Pro Motocross Championship) is an American motorcycle racing series. The motocross race series was founded and sanctioned by the American Motorcyclist Association (AMA) in 1972. The series is the major outdoor motocross series in the United States and is sanctioned by AMA Pro Racing and managed by MX Sports Pro Racing.
Ryan Dungey is an American retired professional motocross and supercross racer. He competed in the AMA Motocross Championships from 2006 to 2017 and again in 2022. He is a four-time 450cc AMA Supercross Champion, a three-time 450cc AMA Motocross Champion, a one-time 250cc AMA Supercross West & 250cc AMA Motocross Champion.
Husqvarna Motorcycles GmbH is an Austrian company which designs, engineers, manufactures and distributes motocross, enduro, supermoto and street motorcycles.
Marvin Musquin is a French retired professional motocross and supercross racer. He competed in the Motocross World Championships from 2004 to 2010 and the AMA Motocross Championships from 2011 to 2023. He is a two-time MX2 World Champion & the 2015 250cc AMA Supercross East Champion.
Ken Roczen is a German professional motocross and supercross racer. He competed in the Motocross World Championships from 2009 to 2011 and the AMA Supercross Championships since 2011. He is the 2011 MX2 World Champion, a two-time 450cc AMA Motocross Champion, the 2013 AMA Supercross 250cc West Champion & a two-time FIM World Supercross WSX Champion. He was also a member of the winning German team at the 2012 Motocross des Nations.
Eli Phillip Calvin Tomac is an American professional Motocross and Supercross racer competing in the AMA Supercross and Motocross championships; a two-time 450cc AMA Supercross Champion, a four-time 450cc AMA Motocross Champion, a one-time 250cc AMA Supercross & AMA Motocross Champion. He is second all-time in 450cc AMA Supercross wins with 52, and third all-time in 450cc AMA Motocross wins with 32.
The 2017 AMA Motocross Championship season is the 45th AMA Motocross National Championship season, the premier motocross series in USA. Ken Roczen goes into the season as the defending champion in the 450 class after taking his second national title in 2016. In the 250 class Cooper Webb is the defending champion after taking his maiden title last season.
Jason Anderson is an American professional Motocross and Supercross racer. He has competed in the AMA Motocross and Supercross championships since 2011. Nicknamed "El Hombre", he is the 2018 450cc AMA Supercross Champion, the 21st winner of the Supercross title.
The Monster Energy AMA Amateur National Motocross Championship, formerly the Loretta Lynn's Amateur Championship, is held annually on Loretta Lynn's family ranch in Hurricane Mills, Tennessee. It is known as the world's largest amateur motocross race. It is the final stop for amateurs before they join the professional ranks.
Cooper Webb is an American professional Motocross and Supercross racer competing in the AMA Supercross and Motocross championships; a two-time 450cc AMA Supercross Champion, a two-time 250cc AMA Supercros West Champion & a one-time 250cc AMA Motocross Champion.
The 2019 AMA Motocross Championship season is the 47th AMA Motocross National Championship season, the premier motocross series in USA. Eli Tomac goes into the season as the defending champion in the 450 class, after taking his second 450 national title in 2018.
The 2020 AMA Supercross Championship is an American motorcycle racing championship that started January 4, 2020, and ended June 21, 2020. Ten of the 17 rounds had been completed when the season was suspended on March 12, 2020, as a result of the COVID-19 pandemic. On May 14, 2020, promoter Feld Entertainment announced the season would conclude with races on Wednesdays and Sundays at Rice-Eccles Stadium in Salt Lake City, Utah.
The 2021 AMA Supercross Championship was the 48th season of professional Supercross racing in the United States. The series is sanctioned by the FIM as the world championship of the sport.
Zach Osborne is an American former professional motocross, supercross and enduro racer. He currently works as a television sports commentator. He competed in the AMA Motocross Championships from 2006 to 2007 and in the Motocross World Championships from 2008 to 2012, before returning to compete in the AMA Motocross Championships from 2013 to 2022. Osborne is notable for winning two AMA motocross national championships and, has represented the United States as a member of American teams at the Motocross des Nations, as well as in the International Six Days Enduro.
Chase Sexton is an American professional Supercross and Motocross racer competing in the AMA Supercross and Motocross championships; a one-time 450cc AMA Supercross Champion& a two-time 250cc East AMA Supercross Champion. He was a member of the winning USA team at the 2022 Motocross Des Nations.
Shane McElrath is an American professional Motocross and Supercross racer.
Aaron Plessinger is an American professional motocross and supercross racer. Plessinger has ridden professionally in the AMA Supercross Championship and the AMA Motocross Championship since 2015. He is a one-time AMA Supercross 250cc West & AMA Motocross 250cc Champion.
The 2023 AMA Motocross Championship season was the 52nd AMA Motocross National Championship season, the premier motocross series in USA. Eli Tomac went into the season as the defending champion in the 450 class, after taking his fourth 450 national title in 2022. However, after an injury sustained during the 2023 AMA Supercross Championship Tomac did not defend his title. In the 250 class, Jett Lawrence went into the season as the defending champion, after winning his second 250 title the previous season. However, Lawrence moved up to the 450MX class, which meant he did not defend his title.
Hangtown Motocross Classic 
Eli Tomac 
Thunder Valley National 
High Point National 
Marvin Musquin 
Tennessee National 
Southwick National 
Red Bud National 
Ken Roczen 
Spring Creek National 
Washougal National 
Unadilla National 
Budds Creek National 
Ironman National 
