Generally, between 2am to 5am, a good number of participants will drop out of the race and stay in their tents. To gain the most mileage at Europe’s Toughest Mudder, you must continue to run throughout the night. During the darkest hours of the night, you may not see runners for a good few hours. As a result, those that push through the night are more likely to gain the most miles. This is a mental challenge above all else.