Oscar De La Hoya is opening up on one of the most traumatic experiences of his life ... revealing he was raped at age 13 by an "older woman" -- something he's still struggling to come to terms with today.
The 48-year-old boxing legend detailed the alleged incident for the first time this week ... claiming it happened at a boxing tournament in Hawaii with a woman who was "over 35."
"I was raped at 13, from a woman, an older woman," ODLH told the LA Times.