I think Amber is on target there:

"I also think that targeting collegiate cross country runners would be a good place to start"

I've converted runners, swimmers, soccer players, triathletes and skiiers into bicycle riders/ racers. They already have fitness and competitive drive. XC skiiers in particular need a sport for their "off season".
Find the women on your campus who do those sports and offer a group ride and/or clinic to introduce them to the sport.

Rock climbers tend to make good mountain bike racers. They have good strength and balance and are fearless.