Notes
Ran through Waveny (2.5 w Byron), since it was creepily warm (60s), and a lot of the ice had melted. Did one fast-ish mile on the track (6:15) just to see what my legs had. The answer was "not much"
I took ibuprofen before, stopped several times to stretch which made my knee feel better each time. Some pain regardless.
Knee didn't feel too bad the day thereafter, though it was a little sore (to the touch)