MUD JUMP Runners participate in the Marine Corps Community Service annual Mud Run at Lake O’Neil on Marine Corps Base Camp Pendleton, Calif., June 7, 2009. Runners must travel over hills, through tire obstacles, cross rivers, climb over two 5-foot walls with mud on both sides, and make their way through a 30-foot-long mud patch to complete the 10k course. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 503275-C-FQC51-266.jpg Photo Gallery