This camp with Alison Dunlap used to be women-only, but it looks to be coed now.
http://www.westernspirit.com/trips/a...ab_intadv.html

http://www.whistlerbike.com/camps-le...omen/index.htm

http://www.dirtseries.com/

Rim Tours has women-only tours
http://www.rimtours.com/our-tours.html