Ever wonder what a supercross looked like back in the very early days of the sport? Ever try to imagine just how far we've come from what was called the AMA/Yamaha Super Series of Stadium Motocross to what we now know as Monster Energy AMA Supercross? We recently came across a stash of photos from the very first race held in Texas Stadium in Irving, Texas, home of the Dallas Cowboys. The race took place on February 28, 1975, and was won by Can-Am rider Jimmy Ellis, whose mechanic was his father, George. Team Honda's Marty Smith finished second, Suzuki's Billy "Sugar Bear" Grossi was third, the late Gaylon Mosier was fourth on a Maico, and Marty Tripes rounded out the top five on a Bultaco Pursang.

The race took place over two nights, and Cycle News reported that there was a total of 48,000 fans on hand. There were two "motos" per night, and all four were added up to get the overall scores. Ellis won the first three, then followed Smith home in the fourth and final moto. Throughout the weekend, fans were entertained by race announcer Larry "Super Mouth" Huffman. 

There was also a 500 class, won by Texas' own Steve "Short Stack" Stackable on his Maico GP 400. He was challenged throughout the weekend by Yamaha's Jimmy Weinert, Suzuki's Tony DiStefano, and Kawasaki rider Gary Semics. 

Here is the interesting thing: Miller was the editor of Motocross Action in 1975, and in the magazine's coverage of the Dallas SX, none of these photos, which we believe Miller himself shot, ran in the story. Instead, they stuck with assistant editor Pete Szilagyi's photos. So, most of these photos are probably being published for the very first time—and certainly the first time online! 

Here are the results from the 250 class.

And here's what supercross looked like in 1975!