I think I'm going to do the Zion Country ride. I have another century I'm doing in Calif a couple of weeks later so that will be a good test for my butt.

I'm still not sure about Ghost Town. April seems so far away but it really isn't. It doesn't say if there are alternate distances (that is, any less than 100). I'll have been on a almost week-long mt bike trip the week before and may only want to do a metric/partial. Sulis, did you find out anything else about the ride?