Mud Wall Marines and sailors climb over a mud wall while participating in the 2017 Marine Corps Mud Run by Lake O'Neill at Camp Pendleton, Calif, June 9, 2017. Marine Corps photo by Sgt. Hector de Jesus SHARE: Download: Full Size (1.52 MB) Tags: Marines, Northcom, Northern Command, training, Marine Corps Credit: Sgt. Hector de Jesus VIRIN: 170609-M-PC554-218A.JPG Photo Gallery