Challenge Nation pioneered the urban-adventure race with a race season that includes visits to 35 cities across the country. Each scavenger hunt is personalized to the hosting city, exploring its many diverse neighborhoods with a series of clues that would test even the most skilled children's-book detective. The teams—comprised of at least two people—vie for a $300 first-place prize. The _Amazing Race_–style competition rewards quick wits and wise planning over physical fitness, so the best way to prepare is by doing logic puzzles while eating Funyuns and lounging in a La-Z-Boy. The top 25 teams qualify, the top five receiving free entry, to compete in the national championship, which rewards winning teams with a $5,000 cash prize.