Imagine a wave so big it darkens the horizon as it rolls in.
Just south of San Francisco, this surf spot is called Mavericks.
Sarah Gerhardt is the first women to surf this famously dangerous big-wave spot. She did that in 1999 when she was 24. Now, at 42, she's one of six women comprising the first women's heat in a surfing contest there.
The women will compete for $30,000 in the Titans of Mavericks, surfing waves that swell well beyond 30 feet.