On race day, teams of up to three walk, skip, or run through the little-known nooks of Portland, gathering and solving clues that lead through neighborhoods such as the Pearl District, Hawthorne District, and Twenty-Third Avenue, with one lucky team traipsing its way to a $300 prize. Clues range from anagrams and pop-culture trivia to deciphering graffiti written in pig Latin. Interspersed throughout the race are mettle-testing challenges, molding iron wills to such tasks as building a house from cards or identifying ice-cream flavors. The top three teams with the fastest gams and sharpest puzzle-solving skills will also win free entry in the National Championship race on Saturday, November 5, which has a grand prize of $5,000 and will be held in sunny Las Vegas (top 25 teams qualify for the race). Winners for best costumes, top senior (55 and older), and best tweet will also receive prizes. The competition begins at noon, and check-in runs from 11 a.m. to 11:45 a.m. The race takes between three and five hours, and jet packs are strictly prohibited. All competitors receive a CitySolve Urban Race T-shirt.