Event Description Registration starts at 8am. The 5k and 10k will both start at 9:30am. The first 100 registered participants will receive a swag bag! Event Location & Accomodations Trending Events Tough Mudder Colorado 2024 Ninja 5K, & 10K at Midlothian Mines Park, Midlothian, VA (11-9-2024) X-athlon