SAN DIEGO, CA June 9th, 2017 | Participants run down a steep hill with Lake O'Neill in the background as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)
35 Images

SPOTTED: 6/9/17 Marine Corps Mud Run

SAN DIEGO, CA June 9th, 2017 | Participants run down a steep hill with Lake O'Neill in the background as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants run down a steep hill with Lake O’Neill in the background as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants navigate and obstacle course of tires while they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants navigate and obstacle course of tires while they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants navigate and obstacle course while they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants navigate and obstacle course while they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants navigate and obstacle course while they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants navigate and obstacle course while they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants climb up the "slippery hill" while being sprayed with water as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants climb up the “slippery hill” while being sprayed with water as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants climb up the "slippery hill" while being sprayed with water as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants climb up the “slippery hill” while being sprayed with water as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants climb up the "slippery hill" while being blasted with water as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants climb up the “slippery hill” while being blasted with water as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants climb up the "slippery hill" while being sprayed with water as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants climb up the “slippery hill” while being sprayed with water as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants climb up the "slippery hill" while being blasted with water as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants climb up the “slippery hill” while being blasted with water as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants climb up the "slippery hill" while being sprayed with water as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants climb up the “slippery hill” while being sprayed with water as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants climb up the "slippery hill" while being blasted with water as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants climb up the “slippery hill” while being blasted with water as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants climb up the "slippery hill" while being blasted with water as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants climb up the “slippery hill” while being blasted with water as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants start the run as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants start the run as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants startle run as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants startle run as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants start the run as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants start the run as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants wash off in the Dr. Bronner's Magic Foam Experience after competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants wash off in the Dr. Bronner’s Magic Foam Experience after competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants wash off in the Dr. Bronner's Magic Foam Experience after competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants wash off in the Dr. Bronner’s Magic Foam Experience after competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants wash off after competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants wash off after competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants wash off after competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants wash off after competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants wash off after competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants wash off after competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | After completing the mud pit, a participant washes off his face during the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | After completing the mud pit, a participant washes off his face during the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants have a little fun in a mud pit as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants have a little fun in a mud pit as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants slog through a mud pit as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants slog through a mud pit as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants exit a mud pit as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants exit a mud pit as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | With a loaded backpack, a participant slogs through a mud pit during the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | With a loaded backpack, a participant slogs through a mud pit during the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Keeping his smokes dry, a participant slogs through a mud pit while competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Keeping his smokes dry, a participant slogs through a mud pit while competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants slog through a mud pit as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants slog through a mud pit as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | A participant finishing the mud pit gets encouragement while competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | A participant finishing the mud pit gets encouragement while competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants slog through a mud pit as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants slog through a mud pit as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | With a cell phone in hand, a participant crawls through a mud pit while competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | With a cell phone in hand, a participant crawls through a mud pit while competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants slog through a mud pit as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants slog through a mud pit as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants help each other as they slog through a mud pit while competing in the Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants help each other as they slog through a mud pit while competing in the Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants slog through a mud pit as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | Participants slog through a mud pit as they compete in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | A participant jumps into the mud pit while competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune)

SAN DIEGO, CA June 9th, 2017 | A participant jumps into the mud pit while competing in the annual Marine Corps Mud Run on Friday morning at Camp Pendleton, California. | (Eduardo Contreras / San Diego Union-Tribune) (Eduardo Contreras / San Diego Union-Tribune)

1/35