I'm surprised to hear the gender balance so lopsided. We have a TON of female riders up here, and many commuters. It's gotta be 50/50 I would think although I have done no formal analysis!

On my route I regularly see 2-3 women (oh, and that's a lot, I only see about 4-5 people on my ride in). And the women are the ones doing the LONG commutes!

In general though, being active is something most people around here do and we seem to become obsessed with riding once spring/summer hits. Being in the north, I think we're just so damned glad it's finally warm and bright out, that we'll do anything to stay outside longer!!