If you're intent on doing a near-60 mile ride Snday and aren't up to being your own leader, you might want to consider the other rides of comparable speed and distance going off around the same time.
Cold (and wet) weather wuss that I am, I seldom-to-never ride below 55º. That accounts for tomorrow being my, I think, only fourth ride since last November...not that I don't reach my mid-season form, so low is it, in two rides.
Anyhow, the liklihood is I'll cut my participation in the ride short as fingers, toes, and another extremity feel extreme cold to the point of not feeling.