Most Amazing Races take 1.5 -2 hours to complete depending on how much they run, how long they take to complete challenges, and the time taken to solve the riddles locating their next clue. There are red Roadblocks which are the game challenges that must be completed in order to earn the next clue. The yellow Detour cards are choices between two different challenges. The blue Route Clues take the contestants from one place to another. There are 10-12 challenges along the way, including a treasure map with X's identifying the location of their team flags. The contestants need to wear tennis shoes (or rubber boots if muddy), comfortable clothing, and really need to arrive on time, or even slightly early, so the race can be started on time. We usually don't cancel the race due to a slight rain. Actually, the kids seem to enjoy it more in the rain.