Is there one (and only one) endurance sport in which women outperform men?

Question

I remember being told that there is one and only one endurance sport in which the women's world record exceeds the men's world record, and that the sport is Long Distance Endurance Swimming. Reason being that fattier tissue on a woman's body make it easier for women to float for a sustained period of time (and also endure cold/discomfort?)

The idea that women can consistently and at a world class level outperform men physically in at least one sport is appealing ...

But is any of the above true?

Answer 1

The marathon swimming records show that men are consistently outperforming women: http://imshof.org/records/marathon-swimming-records/

The same goes for many other endurance sports: the records are still held by men.

What you can find however is that women are comparatively better in endurance than men: the relative difference between the times decreases. See eg.:

The information presented in the previous two paragraphs leads to the prediction that women might compete against men most successfully in events lasting several hours, where overheating and glycogen depletion are particularly common. The limited data we have so far provide preliminary support for this idea. It has been shown that women can sometimes finish ultramarathons in times similar to those of men who can beat them in "short" (26.2-mile) marathons (Bam et al., Medicine and Science in Sports and Exercise 29: 244-7, 1997). And when men and women with equivalent marathon times are pitted against each other in ultras, the women tend to win (Speechly et al., Medicine and Science in Sports and Exercise 28: 359-65, 1996).

http://faculty.washington.edu/crowther/Misc/RBC/gender.shtml