Mud runs are obstacle course races that take place in muddy environments, often featuring a variety of challenges such as climbing walls, crawling under barriers, and navigating through water pits. Participants typically run a set distance, which can range from a few miles to over ten miles, while tackling these obstacles along the way. These events are popular among fitness enthusiasts and are often designed for people of all skill levels. Many mud runs, like the Tough Mudder or Spartan Race, emphasize teamwork and camaraderie, encouraging participants to help each other overcome obstacles and enjoy the experience together.