I went for a long run on Saturday. I got out in the freezing fog and did about 21k, around a half marathon. It felt good until near the end when I sort of twisted my right knee (it's recovered completely now).
It felt pretty good out there except for the cold and the bit where I nearly killed myself when a squirrel ran in front of me. I would have been suing the Tufty Club had I gone over.
It's a couple of days later now and I feel fine. So it's just a matter of booking a marathon....