19 out of the 66 bicyclists I saw this morning were female, making it about 29%. I saw a group of about 10 riders or so before that, and many of them were women, but I didn't start counting until later. Of those 19 there were some serious all-weather commuters (woman with the funny noodle figure-8 bars) some roadies, some on hybrids, a mountain bike, and a couple on some of those step-through bikes... the whole range... and the same can be said for the guys. Except that many more guys ride mountain bikes.