Foggy day. The first launch was aborted at the last minute because I was running out of runway and the fog closed in. I reset and waited twenty minutes and launched into spotty fog. I could see that it was going to be totally socked in quickly. Even staying over the field was a challenge because There would only occasionally be a hole that allowed me to see through the fog to get my bearings. The first time I set up to land I was too high and I had to circle around to the north end of the runway. The second time I was lower but the fog was almost a perfect white out. Just as I was about to give up and climb back over the fog I saw the trees on the West side of the runway and I followed it down to the surface.