I wanted to go up this weekend and try for another Hog, I even took Friday off from work so I could have four days to do it. I have stood on the ice at -26, but don't want to do it again as I frost nipped the end of my nose when I pulled down my face mask to talk to a lady. I don't mind going at-18 and find it pleasant at -10. However I have my limits and I would call -40 well beyond my limits. The walls of my quick flip III look like the inside of a freezer at -20. I think the thing would to bits at -40. We are thinking of hitting Trail lake or Kenai Lake as it's a bit warmer down south.