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The remaining families exit Missouri and head off to Kansas, Oklahoma and Texas. The patriarchs heat up the competition with a barbecue challenge.

The remaining five families continue their journey through Route 66, as they head to New Mexico and Arizona. Among the competitions are a pie eating contest, hot-air balloons and a giant meteor crater.

The families depart from the Arizona Meteor Crater and drive across the desert environs while on their way to the Grand Canyon. While on their way they stop off at Slide Rock State Park in Arizona for some slippery fun.