Looks like the Tough Mudder, except the Tough Mudder is 9-12 miles long and crazier obstacles. This is "only" 3 miles.
*3 miles would kick my a$$ right about now*
"The Marines I have seen around the world have, the cleanest bodies, the filthiest minds, the highest morale, and the lowest morals of any group of animals I have ever seen. Thank God for the United States Marine Corps." Eleanor Roosevelt, 1945