Supercross comes to Chase Field; Allison Alexander goes for a ride

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PHOENIX -- You won't find a baseball in sight at the home of the Diamondbacks for the next few days.

That's because the Monster Energy Super cross Championships are at Chase Field, along with thousands of pieces of plywood,  about 1.5 million pounds of dirt, and some of the best riders in the country. 

It takes a crew of seven with construction equipment several days to build the course. 

They started transforming the ballpark on Tuesday, for Saturday's performance, which will include local riders.

Ryan Clark, from Glendale, is one of them. He says he caught the bug at an early age and although many might consider him "too old" for the sport, he just can't give it up.

The average Super cross rider is 25, but you can go pro at 16.  Clark is 33.

In 2012, Monster Energy Super cross will host 17 races. 

The first one was earlier this year in Anaheim, Calif. just a few days ago.  The final race will be in Las Vegas, Nev. on May 5, where the champions will be crowned.

Clark took me for a ride, and we even did some jumps, albeit very slowly -- nowhere near race speed.

Doors open at Chase Field for the Monster Energy Super cross World Championship Saturday at 12:30 p.m.