Competitors are off the line at 8 a.m. and have until 6 p.m. to complete 115 miles of racing. More than 100 will start, few will finish.

Published:Caption:Photo:Emme Hall/CNET
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Rock sections are named to intimidate: Wrecking Ball, Jackhammer, Hell's Gate. A winch is absolutely necessary.

Published:Caption:Photo:Emme Hall/CNET
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Co-drivers are responsible for keeping the driver on track, running up to winch points and changing tires.

Published:Caption:Photo:Emme Hall/CNET
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A good luck charm on the back of a rig.

Published:Caption:Photo:Emme Hall/CNET
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Big tires and big shocks are necessary if you want to take the podium at the Smittybilt Every Man Challenge.

Published:Caption:Photo:Emme Hall/CNET
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My, what a large bumper you have! With limited rear visibility and incredibly loud engines, it's often difficult for drivers to see behind them. If another driver catches them it's legal to give the slower rig a little tap, or "nerf," just to let them know they've been pulled.

Published:Caption:Photo:Emme Hall/CNET
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Rigs carry one spare and one high-lift jack. The hope is to not have to use either. A tire change adds precious time.

Published:Caption:Photo:Emme Hall/CNET
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Gertrude the Jeep. Wonder if it was named after the driver's grandmother?

Published:Caption:Photo:Emme Hall/CNET
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This rig isn't racing, but it looks pretty badass and it's for sale!

Published:Caption:Photo:Emme Hall/CNET
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Straight axles are best for getting up and over the rocks, but they can slow drivers down in the high-speed desert section.

Published:Caption:Photo:Emme Hall/CNET
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If these rigs don't make you want a Jeep, I'm not sure what will.

Published:Caption:Photo:Emme Hall/CNET
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You can watch the Smittybilt Every Man Challenge live today, February 4, at www.ultra4racing.com/live

Published:Caption:Photo:Emme Hall/CNET
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These rigs have to crawl over ridiculously large rocks and perform on high-speed desert sections.

Published:Caption:Photo:Emme Hall/CNET
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