The City Mad Dash builds competitive camaraderie by sending teams of no more than five individuals on an urban scavenger hunt, armed with nothing but a smartphone as their guide. Participants activate the four-hour trek by logging into the GooseChase mobile application, rife with more than 40 missions to tackle urban landscape and more than 50 ways to capture rogue geese. Though assignments remain secret until the race, example activities include working covertly in a service job where team members are not employed, cleaning a stranger's car windshield, and convincing brave pedestrians to receive an on-street dental exam. Tasks are completed when a clear and creative photo is sent to a team of judges. The squad to accomplish the most challenges and interact with its city in the most inventive, least evil manner during the four hours earns $200, the title of Ultimate Scavenger Hunter, and a complimentary invisibility cloak. Participants can relive the action through an online album of photographs from every team's adventure. An after-party follows the event until 5 p.m.