NO PURCHASE NESCESSARY. Open to legal residents of the 48 contiguous United States (excluding Rhode Island), 18 years or older and over the age of the majority in jurisdiction of residence at time of entry. Ends 8/20/2017 at 11:59 pm ET. For Official Rules, go to http://www.refinery29.com/sweeps/tough-mudder-2017/terms. Void where prohibited.