I know, it's gonna be yucky lol. But it's not going to be too bad because our run is enclosed and we put wood-framed plastic panels up on the sides to keep the snow/wind out on all sides but one for the winter, so the run is staying dry for the most part. Except for the part that got compacted by the heavy rains we got before we put the plastic panels up, I've been able to scoop most of the poop out in the run, but for the last few days it's been frozen to the poop boards inside the coop in some spots, those are the spots that I'm going to have to chisel out .
Here's a pic of our coop/run with the plastic panels. They are held on with hourglass shaped latches, so they are easily removeable in the spring.