As always, "ciclonudista", "ciclonudisti", and "cyclonue" are good search terms to try. The best thing I've found so far is this video of WNBR Valencia, and the photos taken by the same photographer.
youtube.com/watch?v=UrBWlwACFoQ
It's not a very large ride, but the women are very attractive and... dedicated.
There are more pictures at franciscofotos.com, but the quality is much, much better at his Flickr page:
flickr.com/photos/francisco_prieto/sets/72157626946203308/with/5830021173/
Be sure to check out the video, though. It's good quality, and it has a lot of stuff that isn't in the photos.