Update on the efficacy of the ice bath:

I hate to say this, but it seems to have been kind of worth it. I had virtually no muscle or joint pain yesterday. Fatigue yes (quite a bit), but pain no. Today the very tops of my quads (which were the one part of my legs not to be completely submerged in the bath) are a little sore, but only a little, and the rest of me is completely fine. Usually I would be pretty sore after a run like that.

Argh. This means I can't justify refusing to do it ever again.