Yep, they already answered it. It's a men's race because women just can't compete at the level the men can, mostly a strength and fitness issue. Sponsors want to sponsor winners and sponsors are what it's all about. Some say, if the race was longer...women would win. That's when their real advantages and strengths come into play.

They have a few women's races like it. Here is a small non competitive one that is running this year at the same time: http://www.reve.cc/